Home / 431,385.20-647,079.46-131,864.60

Finding the Fourth Proportional to 431,385.20, 647,079.46 and 131,864.60

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Solution

The fourth proportional to 431,385.20, 647,079.46 and 131,864.60 is: 197,797.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,385.20 : 647,079.46 = 131,864.60 : x
  2. Step 2: Convert to fraction form
    431,385.20/647,079.46 = 131,864.60/x
  3. Step 3: Cross multiply
    431,385.20x = 647,079.46 × 131,864.60
  4. Step 4: Simplify right side
    431,385.20x = 85,326,874,161.12
  5. Step 5: Solve for x
    x = 85,326,874,161.12/431,385.20
  6. Step 6: Final answer
    x = 197,797.41

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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.