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Finding the Fourth Proportional to 424,420.39, 636,693.89 and 140,140.97

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Solution

The fourth proportional to 424,420.39, 636,693.89 and 140,140.97 is: 210,232.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,420.39 : 636,693.89 = 140,140.97 : x
  2. Step 2: Convert to fraction form
    424,420.39/636,693.89 = 140,140.97/x
  3. Step 3: Cross multiply
    424,420.39x = 636,693.89 × 140,140.97
  4. Step 4: Simplify right side
    424,420.39x = 89,226,897,841.10
  5. Step 5: Solve for x
    x = 89,226,897,841.10/424,420.39
  6. Step 6: Final answer
    x = 210,232.35

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1.5x scale

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.