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Finding the Fourth Proportional to 424,226.32, 636,204.16 and 139,863.88

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Solution

The fourth proportional to 424,226.32, 636,204.16 and 139,863.88 is: 209,751.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,226.32 : 636,204.16 = 139,863.88 : x
  2. Step 2: Convert to fraction form
    424,226.32/636,204.16 = 139,863.88/x
  3. Step 3: Cross multiply
    424,226.32x = 636,204.16 × 139,863.88
  4. Step 4: Simplify right side
    424,226.32x = 88,981,982,289.74
  5. Step 5: Solve for x
    x = 88,981,982,289.74/424,226.32
  6. Step 6: Final answer
    x = 209,751.21

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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.