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Finding the Fourth Proportional to 331,613.20, 497,614.20 and 121,272.40

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Solution

The fourth proportional to 331,613.20, 497,614.20 and 121,272.40 is: 181,979.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,613.20 : 497,614.20 = 121,272.40 : x
  2. Step 2: Convert to fraction form
    331,613.20/497,614.20 = 121,272.40/x
  3. Step 3: Cross multiply
    331,613.20x = 497,614.20 × 121,272.40
  4. Step 4: Simplify right side
    331,613.20x = 60,346,868,308.08
  5. Step 5: Solve for x
    x = 60,346,868,308.08/331,613.20
  6. Step 6: Final answer
    x = 181,979.69

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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.