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Finding the Fourth Proportional to 238.98, 329.71 and 135.48

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Solution

The fourth proportional to 238.98, 329.71 and 135.48 is: 186.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.98 : 329.71 = 135.48 : x
  2. Step 2: Convert to fraction form
    238.98/329.71 = 135.48/x
  3. Step 3: Cross multiply
    238.98x = 329.71 × 135.48
  4. Step 4: Simplify right side
    238.98x = 44,669.11
  5. Step 5: Solve for x
    x = 44,669.11/238.98
  6. Step 6: Final answer
    x = 186.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.