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Finding the Fourth Proportional to 624.89, 861.75 and 477.27

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Solution

The fourth proportional to 624.89, 861.75 and 477.27 is: 658.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.89 : 861.75 = 477.27 : x
  2. Step 2: Convert to fraction form
    624.89/861.75 = 477.27/x
  3. Step 3: Cross multiply
    624.89x = 861.75 × 477.27
  4. Step 4: Simplify right side
    624.89x = 411,287.42
  5. Step 5: Solve for x
    x = 411,287.42/624.89
  6. Step 6: Final answer
    x = 658.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.