Question

Which of the following proportions could be used to convert 3600 feet into miles

x/3600ft=5280ft/1mi

3600/x=5280/1

3600/5280=1

3600/1=5280/x

Answer 1

Go with the 2nd choice.

Explanation:

When using proportions to solve for unknown quantities, you need to keep the same units on the same side. This means keep "ft" on the top side and "mi" on the bottom side.