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Finding the Fourth Proportional to 238.26, 356.61 and 129.54

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Solution

The fourth proportional to 238.26, 356.61 and 129.54 is: 193.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.26 : 356.61 = 129.54 : x
  2. Step 2: Convert to fraction form
    238.26/356.61 = 129.54/x
  3. Step 3: Cross multiply
    238.26x = 356.61 × 129.54
  4. Step 4: Simplify right side
    238.26x = 46,195.26
  5. Step 5: Solve for x
    x = 46,195.26/238.26
  6. Step 6: Final answer
    x = 193.89

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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.