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Finding the Fourth Proportional to 398,872.35, 598,363.20 and 132,605.10

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Solution

The fourth proportional to 398,872.35, 598,363.20 and 132,605.10 is: 198,925.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,872.35 : 598,363.20 = 132,605.10 : x
  2. Step 2: Convert to fraction form
    398,872.35/598,363.20 = 132,605.10/x
  3. Step 3: Cross multiply
    398,872.35x = 598,363.20 × 132,605.10
  4. Step 4: Simplify right side
    398,872.35x = 79,346,011,972.32
  5. Step 5: Solve for x
    x = 79,346,011,972.32/398,872.35
  6. Step 6: Final answer
    x = 198,925.83

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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.