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Finding the Fourth Proportional to 398,660.20, 597,860.70 and 132,375.40

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Solution

The fourth proportional to 398,660.20, 597,860.70 and 132,375.40 is: 198,520.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,660.20 : 597,860.70 = 132,375.40 : x
  2. Step 2: Convert to fraction form
    398,660.20/597,860.70 = 132,375.40/x
  3. Step 3: Cross multiply
    398,660.20x = 597,860.70 × 132,375.40
  4. Step 4: Simplify right side
    398,660.20x = 79,142,049,306.78
  5. Step 5: Solve for x
    x = 79,142,049,306.78/398,660.20
  6. Step 6: Final answer
    x = 198,520.07

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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.