Aug 14 (Reuters) - Gold advanced on Friday and was headed for a weekly gain, buoyed by a weaker dollar after in-line U.S. inflation readings this week tipped the scales in favor of an interest rate hold by the Federal Reserve next month. Spot gold was up 0.7% at $4,379.95 per ounce by 1:40 p.m. EDT (1740 GMT). Prices declined 1.3% in the previous session on profit-taking after touching their highest level since June 5. Bullion is up around 0.9% for the week so far.