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Finding the Fourth Proportional to 225.39, 338.10 and 129.27

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Solution

The fourth proportional to 225.39, 338.10 and 129.27 is: 193.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.39 : 338.10 = 129.27 : x
  2. Step 2: Convert to fraction form
    225.39/338.10 = 129.27/x
  3. Step 3: Cross multiply
    225.39x = 338.10 × 129.27
  4. Step 4: Simplify right side
    225.39x = 43,706.19
  5. Step 5: Solve for x
    x = 43,706.19/225.39
  6. Step 6: Final answer
    x = 193.91

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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.