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Finding the Fourth Proportional to 331,372.20, 497,187.90 and 121,031.40

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Solution

The fourth proportional to 331,372.20, 497,187.90 and 121,031.40 is: 181,594.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,372.20 : 497,187.90 = 121,031.40 : x
  2. Step 2: Convert to fraction form
    331,372.20/497,187.90 = 121,031.40/x
  3. Step 3: Cross multiply
    331,372.20x = 497,187.90 × 121,031.40
  4. Step 4: Simplify right side
    331,372.20x = 60,175,347,600.06
  5. Step 5: Solve for x
    x = 60,175,347,600.06/331,372.20
  6. Step 6: Final answer
    x = 181,594.44

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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.