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Finding the Fourth Proportional to 415,115.28, 622,766.07 and 126,952.11

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Solution

The fourth proportional to 415,115.28, 622,766.07 and 126,952.11 is: 190,456.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,115.28 : 622,766.07 = 126,952.11 : x
  2. Step 2: Convert to fraction form
    415,115.28/622,766.07 = 126,952.11/x
  3. Step 3: Cross multiply
    415,115.28x = 622,766.07 × 126,952.11
  4. Step 4: Simplify right side
    415,115.28x = 79,061,466,622.91
  5. Step 5: Solve for x
    x = 79,061,466,622.91/415,115.28
  6. Step 6: Final answer
    x = 190,456.65

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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.