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Finding the Fourth Proportional to 337.39, 505.90 and 129.17

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Solution

The fourth proportional to 337.39, 505.90 and 129.17 is: 193.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    337.39 : 505.90 = 129.17 : x
  2. Step 2: Convert to fraction form
    337.39/505.90 = 129.17/x
  3. Step 3: Cross multiply
    337.39x = 505.90 × 129.17
  4. Step 4: Simplify right side
    337.39x = 65,347.10
  5. Step 5: Solve for x
    x = 65,347.10/337.39
  6. Step 6: Final answer
    x = 193.68

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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.