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Finding the Fourth Proportional to 625.28, 938.46 and 409.12

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Solution

The fourth proportional to 625.28, 938.46 and 409.12 is: 614.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.28 : 938.46 = 409.12 : x
  2. Step 2: Convert to fraction form
    625.28/938.46 = 409.12/x
  3. Step 3: Cross multiply
    625.28x = 938.46 × 409.12
  4. Step 4: Simplify right side
    625.28x = 383,942.76
  5. Step 5: Solve for x
    x = 383,942.76/625.28
  6. Step 6: Final answer
    x = 614.03

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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.