A farmer wants to fence in a rectangular area that is 1/8 mile wide by 1/4 mile long. Which of the following proportions can the farmer use to calculate how many feet of fencing he will need? 1mi/5280ft = x/3/8ft or 1mi/5280ft = 3/8mi/x


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Oddman Profile
Oddman answered
Neither one. If you insist on finding the length of the perimeter using a proportion, you might try
  (1 mi)/(5280 ft) = (2*3/8 mi)/(x ft)

You will find that 3/4 of a mile of fence is 3960 ft.
In a proportion, similar units are found in corresponding places.

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