Multiple choice

What is the fourth proportional to $72, 168$ and $150$?

  1. $450$
  2. $300$
  3. $350$
  4. $400$
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C Correct answer
Explanation

For a fourth proportional, a/b = c/d. So 72/168 = 150/d. d = (168 * 150) / 72 = (7 * 150) / 3 = 350.

AI explanation

The fourth proportional to a, b, and c is calculated as (b times c) divided by a. Substituting the given numbers gives (168 times 150) divided by 72. Calculating 168 divided by 72 gives 7/3, and multiplying this by 150 gives 350.

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