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Finding the Fourth Proportional to 243.72, 337.81 and 239.80

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Solution

The fourth proportional to 243.72, 337.81 and 239.80 is: 332.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.72 : 337.81 = 239.80 : x
  2. Step 2: Convert to fraction form
    243.72/337.81 = 239.80/x
  3. Step 3: Cross multiply
    243.72x = 337.81 × 239.80
  4. Step 4: Simplify right side
    243.72x = 81,006.84
  5. Step 5: Solve for x
    x = 81,006.84/243.72
  6. Step 6: Final answer
    x = 332.38

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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.