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Finding the Fourth Proportional to 331,585.60, 497,320.80 and 121,115.20

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Solution

The fourth proportional to 331,585.60, 497,320.80 and 121,115.20 is: 181,651.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,585.60 : 497,320.80 = 121,115.20 : x
  2. Step 2: Convert to fraction form
    331,585.60/497,320.80 = 121,115.20/x
  3. Step 3: Cross multiply
    331,585.60x = 497,320.80 × 121,115.20
  4. Step 4: Simplify right side
    331,585.60x = 60,233,108,156.16
  5. Step 5: Solve for x
    x = 60,233,108,156.16/331,585.60
  6. Step 6: Final answer
    x = 181,651.76

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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.