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Finding the Fourth Proportional to 616.68, 923.13 and 461.70

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Solution

The fourth proportional to 616.68, 923.13 and 461.70 is: 691.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.68 : 923.13 = 461.70 : x
  2. Step 2: Convert to fraction form
    616.68/923.13 = 461.70/x
  3. Step 3: Cross multiply
    616.68x = 923.13 × 461.70
  4. Step 4: Simplify right side
    616.68x = 426,209.12
  5. Step 5: Solve for x
    x = 426,209.12/616.68
  6. Step 6: Final answer
    x = 691.13

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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.