Answer
x=1575
Work Step by Step
We can set the cross products of the given proportion equal to each other and then solve for the unknown variable.
$4\times x=42\times150$
$4x=6300$
Divide both sides by 4.
$\frac{4x}{4}=\frac{6300}{4}$
x=1575
Basic College Mathematics (10th Edition)
by Lial, Margaret L.; Salzman, Stanley A.; Hestwood, Diana L.
Published by
Pearson
ISBN 10:
0134467795
ISBN 13:
978-0-13446-779-5
Chapter 5 - Ratio and Proportion - Review Exercises - Page 373: 27
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