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Finding the Fourth Proportional to 424,498.65, 636,747.97 and 124,979.28

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Solution

The fourth proportional to 424,498.65, 636,747.97 and 124,979.28 is: 187,468.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,498.65 : 636,747.97 = 124,979.28 : x
  2. Step 2: Convert to fraction form
    424,498.65/636,747.97 = 124,979.28/x
  3. Step 3: Cross multiply
    424,498.65x = 636,747.97 × 124,979.28
  4. Step 4: Simplify right side
    424,498.65x = 79,580,299,023.43
  5. Step 5: Solve for x
    x = 79,580,299,023.43/424,498.65
  6. Step 6: Final answer
    x = 187,468.91

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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.