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Finding the Fourth Proportional to 252.77, 379.17 and 115.79

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Solution

The fourth proportional to 252.77, 379.17 and 115.79 is: 173.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    252.77 : 379.17 = 115.79 : x
  2. Step 2: Convert to fraction form
    252.77/379.17 = 115.79/x
  3. Step 3: Cross multiply
    252.77x = 379.17 × 115.79
  4. Step 4: Simplify right side
    252.77x = 43,902.20
  5. Step 5: Solve for x
    x = 43,902.20/252.77
  6. Step 6: Final answer
    x = 173.69

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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.