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Finding the Fourth Proportional to 431,427.76, 647,141.65 and 131,908.37

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Solution

The fourth proportional to 431,427.76, 647,141.65 and 131,908.37 is: 197,862.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,427.76 : 647,141.65 = 131,908.37 : x
  2. Step 2: Convert to fraction form
    431,427.76/647,141.65 = 131,908.37/x
  3. Step 3: Cross multiply
    431,427.76x = 647,141.65 × 131,908.37
  4. Step 4: Simplify right side
    431,427.76x = 85,363,396,645.13
  5. Step 5: Solve for x
    x = 85,363,396,645.13/431,427.76
  6. Step 6: Final answer
    x = 197,862.55

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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.