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Finding the Fourth Proportional to 624.38, 861.10 and 425.54

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Solution

The fourth proportional to 624.38, 861.10 and 425.54 is: 586.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.38 : 861.10 = 425.54 : x
  2. Step 2: Convert to fraction form
    624.38/861.10 = 425.54/x
  3. Step 3: Cross multiply
    624.38x = 861.10 × 425.54
  4. Step 4: Simplify right side
    624.38x = 366,428.67
  5. Step 5: Solve for x
    x = 366,428.67/624.38
  6. Step 6: Final answer
    x = 586.86

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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.