Question

Write a proportion for the following problem. Eric is making a scale drawing of the ground floor of his house. If the scale is 2 in = 5 ft, what number of inches will he use for a length of 55 ft?
A. 2/5 = 55/x
B. 2/55 = x/5
C. 2/5 = x/55

Answer 1

@Directrix

Answer 2

\(\begin{array}{ccllll}
in&ft
\\\hline\\
2&5\\
x&55
\end{array}\implies \cfrac{2}{x}=\cfrac{5}{55}\)

Answer 3

notice, just line up the corresponding units vertically

Answer 4

yes @jdoe0001

Answer 5

would it be C ? @jdoe0001

Answer 6

hmmm yeap, that'd work, since it yields the same equation

Answer 7

Use jdoe0001's table to read down the columns to get
\[\Large \frac{2}{x} = \frac{5}{55}\]
or read across the rows to get
\[\Large \frac{2}{5} = \frac{x}{55}\]
The two equations are equivalent to one another. You can also flip the fractions of both sides to get other equivalent equations.