* Gold rallies above $1,470/oz, silver breaks above $40/oz
* Inflation worries prompts fund to buy precious, commods
* US gov't shutdown worry, rate differentials hit dollar (Recasts, updates prices, market activity; new byline, changes dateline, previously LONDON)
By Frank Tang
NEW YORK, April 8 (Reuters) - Gold rose to a record high for a fourth straight day and silver surged on Friday, as a weaker dollar, the prospect of a U.S. government shutdown and inflation worries lifted bullion above $1,470 an ounce.
Gold is set for its biggest weekly gain in four months, drawing support from renewed euro zone sovereign debt fears amid Portugal's financial crisis and inflation jitters as crude oil and corn hit new highs this week.
On technical charts, gold broke above a key resistance and could next target above $1,500 an ounce. The metal has risen more than 10 percent since late January when political unrest began to flare in the Middle East and North Africa.
"With the expected future inflation being higher in this low interest rate environment, investors are more inclined to have some contributions to commodities as an inflation hedge," said Hakan Kaya, commodities portfolio manager at Neuberger Berman, which manages about $190 billion client assets.
Spot gold <XAU=> rose as high as $1,474.19 an ounce and was later up 1 percent at $1,472.70 an ounce by 11:18 a.m. EDT (1518 GMT).
Silver <XAG=> rose 2.3 percent to $40.40 an ounce, just off the session high of $40.44.
The gold-to-silver ratio -- the number of silver ounces needed to buy an ounce of gold -- fell to a 28-year low near 36 on Friday. (Graphic: http://r.reuters.com/myt88r)
"One would expect silver to outperform in this environment because it bears a higher risk than gold on a volatility basis," Kaya said.
The dollar slide against the euro, supported by widening interest rate differentials after ECB's rate hike, and crude oil's surge to 2-1/2 year high added fuel to a rally that has already taken gold to a series of record highs this year.
A looming government shutdown looming also weighed on the dollar, as Democratic and Republican congressional leaders said there was no overall deal on government funding for the rest of the fiscal year that ends Sept. 30, and could not even agree on what disagreements remain ahead of the midnight Friday deadline. [
]Among other precious metals, platinum <XPT=> gained 1.3 percent to $1,804.24 an ounce, while palladium <XPD=> jumped 2.2 percent to $792.
LAST NET PCT YTD
CHG CHG CHG US gold <GCM1> 1473.80 14.50 1.0% 3.7% US silver <SIK1> 40.430 0.878 2.2% 30.7% US platinum <PLN1> 1812.20 21.60 1.2% 1.9% US palladium <PAM1> 794.75 14.50 1.9% -1.1% Gold <XAU=> 1472.70 15.25 1.0% 3.8% Silver <XAG=> 40.40 0.89 2.3% 30.9% Platinum <XPT=> 1804.24 23.14 1.3% 2.1% Palladium <XPD=> 792.00 16.97 2.2% -0.9% Gold Fix <XAUFIX=> 1469.50 -1.00 -0.1% 4.2% Silver Fix <XAGFIX=> 40.22 71.00 1.8% 31.3% Platinum Fix <XPTFIX=> 1803.00 7.00 0.4% 4.2% Palladium Fix <XPDFIX=> 798.00 9.00 1.1% 0.9% (Addtional reporting by Jan Harvey in London; Editing by David Gregorio)