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Finding the Fourth Proportional to 424,197.69, 636,320.07 and 139,876.76

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Solution

The fourth proportional to 424,197.69, 636,320.07 and 139,876.76 is: 209,822.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,197.69 : 636,320.07 = 139,876.76 : x
  2. Step 2: Convert to fraction form
    424,197.69/636,320.07 = 139,876.76/x
  3. Step 3: Cross multiply
    424,197.69x = 636,320.07 × 139,876.76
  4. Step 4: Simplify right side
    424,197.69x = 89,006,386,532.97
  5. Step 5: Solve for x
    x = 89,006,386,532.97/424,197.69
  6. Step 6: Final answer
    x = 209,822.89

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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.