Home / 431,385.31-647,079.56-131,864.73

Finding the Fourth Proportional to 431,385.31, 647,079.56 and 131,864.73

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Solution

The fourth proportional to 431,385.31, 647,079.56 and 131,864.73 is: 197,797.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,385.31 : 647,079.56 = 131,864.73 : x
  2. Step 2: Convert to fraction form
    431,385.31/647,079.56 = 131,864.73/x
  3. Step 3: Cross multiply
    431,385.31x = 647,079.56 × 131,864.73
  4. Step 4: Simplify right side
    431,385.31x = 85,326,971,467.92
  5. Step 5: Solve for x
    x = 85,326,971,467.92/431,385.31
  6. Step 6: Final answer
    x = 197,797.58

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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.