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Finding the Fourth Proportional to 372.38, 513.65 and 239.56

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Solution

The fourth proportional to 372.38, 513.65 and 239.56 is: 330.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.38 : 513.65 = 239.56 : x
  2. Step 2: Convert to fraction form
    372.38/513.65 = 239.56/x
  3. Step 3: Cross multiply
    372.38x = 513.65 × 239.56
  4. Step 4: Simplify right side
    372.38x = 123,048.11
  5. Step 5: Solve for x
    x = 123,048.11/372.38
  6. Step 6: Final answer
    x = 330.43

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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.