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Finding the Fourth Proportional to 666.72, 1,001.12 and 614

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Solution

The fourth proportional to 666.72, 1,001.12 and 614 is: 921.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.72 : 1,001.12 = 614 : x
  2. Step 2: Convert to fraction form
    666.72/1,001.12 = 614/x
  3. Step 3: Cross multiply
    666.72x = 1,001.12 × 614
  4. Step 4: Simplify right side
    666.72x = 614,687.68
  5. Step 5: Solve for x
    x = 614,687.68/666.72
  6. Step 6: Final answer
    x = 921.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.