Home / 431,780.20-647,713.50-132,257.32

Finding the Fourth Proportional to 431,780.20, 647,713.50 and 132,257.32

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Solution

The fourth proportional to 431,780.20, 647,713.50 and 132,257.32 is: 198,399.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,780.20 : 647,713.50 = 132,257.32 : x
  2. Step 2: Convert to fraction form
    431,780.20/647,713.50 = 132,257.32/x
  3. Step 3: Cross multiply
    431,780.20x = 647,713.50 × 132,257.32
  4. Step 4: Simplify right side
    431,780.20x = 85,664,851,637.82
  5. Step 5: Solve for x
    x = 85,664,851,637.82/431,780.20
  6. Step 6: Final answer
    x = 198,399.21

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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.