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Finding the Fourth Proportional to 625.57, 938.54 and 557.58

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Solution

The fourth proportional to 625.57, 938.54 and 557.58 is: 836.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.57 : 938.54 = 557.58 : x
  2. Step 2: Convert to fraction form
    625.57/938.54 = 557.58/x
  3. Step 3: Cross multiply
    625.57x = 938.54 × 557.58
  4. Step 4: Simplify right side
    625.57x = 523,311.13
  5. Step 5: Solve for x
    x = 523,311.13/625.57
  6. Step 6: Final answer
    x = 836.53

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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.