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Finding the Fourth Proportional to 225.62, 338.20 and 115.87

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Solution

The fourth proportional to 225.62, 338.20 and 115.87 is: 173.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.62 : 338.20 = 115.87 : x
  2. Step 2: Convert to fraction form
    225.62/338.20 = 115.87/x
  3. Step 3: Cross multiply
    225.62x = 338.20 × 115.87
  4. Step 4: Simplify right side
    225.62x = 39,186.10
  5. Step 5: Solve for x
    x = 39,186.10/225.62
  6. Step 6: Final answer
    x = 173.68

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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.