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Finding the Fourth Proportional to 431,083.60, 646,625.41 and 131,565.76

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Solution

The fourth proportional to 431,083.60, 646,625.41 and 131,565.76 is: 197,348.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,083.60 : 646,625.41 = 131,565.76 : x
  2. Step 2: Convert to fraction form
    431,083.60/646,625.41 = 131,565.76/x
  3. Step 3: Cross multiply
    431,083.60x = 646,625.41 × 131,565.76
  4. Step 4: Simplify right side
    431,083.60x = 85,073,761,556.48
  5. Step 5: Solve for x
    x = 85,073,761,556.48/431,083.60
  6. Step 6: Final answer
    x = 197,348.64

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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.