How to Convert Scaled Feet to Proportion

Statement of Equivalency

• 1

  Measure the distance between two points on a map, using the ruler.

• 2

  Multiply the scaled feet on the map by the scale number. If the scale is 1 foot equals 4 miles, multiply 1 times 4.

• 3

  Calculate the conversion. In this example, the converted scaled feet to proportion is 4.

Bar Scale

• 4

  Measure the distance between two points on a map, using the ruler.

• 5

  Compare the measurement to the scale key on the map. Multiply the measurement units from the scale by the scale number. If the measurement equals 4 units on the scale key, and the scale number equals 5 miles, multiply 4 times 5.

• 6

  Calculate the conversion. For this example, the proportion is 20 miles.

Representative Fraction

• 7

  Measure the distance between two points on a map, using the ruler.

• 8

  Multiply the scaled measurement on the map by the ratio number. If the scale is 1:2563, it means 1 inch is equal to 2,563 miles. If you measured 3 inches, multiply 3 times 2,563.

• 9

  Calculate the conversion. For this example, the proportion is 7,689.