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Finding the Fourth Proportional to 238.27, 356.82 and 129.73

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Solution

The fourth proportional to 238.27, 356.82 and 129.73 is: 194.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.27 : 356.82 = 129.73 : x
  2. Step 2: Convert to fraction form
    238.27/356.82 = 129.73/x
  3. Step 3: Cross multiply
    238.27x = 356.82 × 129.73
  4. Step 4: Simplify right side
    238.27x = 46,290.26
  5. Step 5: Solve for x
    x = 46,290.26/238.27
  6. Step 6: Final answer
    x = 194.28

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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.