Suppose the geographic areas of California and the U. S. are 1.637x105 and 3.794x106 sq. mi., respectively. California’s population (as of 2012) is approximately 3.804 × 107 people. If population were proportional to area, what would be the U. S. population? Do not include units (people) in your answer.

If you provide the exact number, round your answer to the nearest ten-million.

For example, 748,789,000 would be written as 750,000,000.

If you write your answer in scientific notation, enter it in the following format:

4.2x10^5

with no spaces, and round the front digit to the nearest tenth.