Elementary Technical Mathematics

Published by Brooks Cole
ISBN 10: 1285199197
ISBN 13: 978-1-28519-919-1

Chapter 7 - Section 7.2 - Proportion - Exercises - Page 277: 37



Work Step by Step

Set the product of the means equal to the product of the extremes and solve for the variable. $442\times55.7=30.1\times x$ $24619.4=30.1x$ $24619.4\div30.1=30.1x\div30.1$ $x=81\underset\uparrow7.920$ Since the digit to the right of the 3rd significant digit is greater than 5, round up.
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