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Finding the Fourth Proportional to 424,519.92, 636,644.70 and 140,157.54

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Solution

The fourth proportional to 424,519.92, 636,644.70 and 140,157.54 is: 210,191.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,519.92 : 636,644.70 = 140,157.54 : x
  2. Step 2: Convert to fraction form
    424,519.92/636,644.70 = 140,157.54/x
  3. Step 3: Cross multiply
    424,519.92x = 636,644.70 × 140,157.54
  4. Step 4: Simplify right side
    424,519.92x = 89,230,555,006.04
  5. Step 5: Solve for x
    x = 89,230,555,006.04/424,519.92
  6. Step 6: Final answer
    x = 210,191.68

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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.