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Finding the Fourth Proportional to 425,001.78, 637,349.63 and 140,639.85

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Solution

The fourth proportional to 425,001.78, 637,349.63 and 140,639.85 is: 210,909.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,001.78 : 637,349.63 = 140,639.85 : x
  2. Step 2: Convert to fraction form
    425,001.78/637,349.63 = 140,639.85/x
  3. Step 3: Cross multiply
    425,001.78x = 637,349.63 × 140,639.85
  4. Step 4: Simplify right side
    425,001.78x = 89,636,755,657.56
  5. Step 5: Solve for x
    x = 89,636,755,657.56/425,001.78
  6. Step 6: Final answer
    x = 210,909.13

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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.