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Finding the Fourth Proportional to 243.39, 337.31 and 238.79

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Solution

The fourth proportional to 243.39, 337.31 and 238.79 is: 330.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.39 : 337.31 = 238.79 : x
  2. Step 2: Convert to fraction form
    243.39/337.31 = 238.79/x
  3. Step 3: Cross multiply
    243.39x = 337.31 × 238.79
  4. Step 4: Simplify right side
    243.39x = 80,543.37
  5. Step 5: Solve for x
    x = 80,543.37/243.39
  6. Step 6: Final answer
    x = 330.92

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.