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Finding the Fourth Proportional to 232.65, 349.18 and 129.78

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Solution

The fourth proportional to 232.65, 349.18 and 129.78 is: 194.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    232.65 : 349.18 = 129.78 : x
  2. Step 2: Convert to fraction form
    232.65/349.18 = 129.78/x
  3. Step 3: Cross multiply
    232.65x = 349.18 × 129.78
  4. Step 4: Simplify right side
    232.65x = 45,316.58
  5. Step 5: Solve for x
    x = 45,316.58/232.65
  6. Step 6: Final answer
    x = 194.78

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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.