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Finding the Fourth Proportional to 238.67, 329.20 and 140.43

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Solution

The fourth proportional to 238.67, 329.20 and 140.43 is: 193.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.67 : 329.20 = 140.43 : x
  2. Step 2: Convert to fraction form
    238.67/329.20 = 140.43/x
  3. Step 3: Cross multiply
    238.67x = 329.20 × 140.43
  4. Step 4: Simplify right side
    238.67x = 46,228.89
  5. Step 5: Solve for x
    x = 46,228.89/238.67
  6. Step 6: Final answer
    x = 193.69

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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.