A map has a scale of 0.7 : 22.1 mi. If Sun Valley and Salem are 3.4 in apart on the map, then how far apart are the real cities?

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Answer 1 · 2018-06-28T06:33:03

See explanation.

The scale of the map is: $\frac{0.7}{22.1}$ $0.7/22.1$ . To calculate the real distance given a distance on a map we have to solve the proportion:

$\frac{0.7}{22.1} = \frac{3.4}{x}$ $0.7/22.1=3.4/x$

We can transform it to:

So $x$ $x$ is:

Answer:

The distance between the cities is about $107.34$ $107.34$ miles.