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You are planning your vacation and trying to figure out the total number of miles you will be traveling on a round trip from Portland, Oregon to Denver, Colorado, and back to Portland, Oregon. The scale for the map you are consulting shows that 1 inch = 4 miles. Measuring, you find that you will be traveling inches for the one-way trip. What is the total number of miles you will be traveling during the entire round trip?
2,516 miles
629 miles
314.5 miles
1258 miles
Detailed Explanation
The easiest way to solve when computing problems of this type is to rewrite the statement in equation form. On one side of the equation is the fraction of 4 miles per 1 inch. On the other side is the fraction of the unknown miles traveled per the measured inches.
Take note that all the mile values are written as numerators and all the inch values are written as denominators.

miles traveled = 4 × 314.5 = 1258 miles
For the round-trip distance, multiply the 1-way distance by 2:
1258 × 2 = 2516 miles
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