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Finding the Fourth Proportional to 424,238.92, 636,223.92 and 143,690.56

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Solution

The fourth proportional to 424,238.92, 636,223.92 and 143,690.56 is: 215,490.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,238.92 : 636,223.92 = 143,690.56 : x
  2. Step 2: Convert to fraction form
    424,238.92/636,223.92 = 143,690.56/x
  3. Step 3: Cross multiply
    424,238.92x = 636,223.92 × 143,690.56
  4. Step 4: Simplify right side
    424,238.92x = 91,419,371,350.20
  5. Step 5: Solve for x
    x = 91,419,371,350.20/424,238.92
  6. Step 6: Final answer
    x = 215,490.30

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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.