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Finding the Fourth Proportional to 372.28, 513.47 and 239.38

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Solution

The fourth proportional to 372.28, 513.47 and 239.38 is: 330.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.28 : 513.47 = 239.38 : x
  2. Step 2: Convert to fraction form
    372.28/513.47 = 239.38/x
  3. Step 3: Cross multiply
    372.28x = 513.47 × 239.38
  4. Step 4: Simplify right side
    372.28x = 122,914.45
  5. Step 5: Solve for x
    x = 122,914.45/372.28
  6. Step 6: Final answer
    x = 330.17

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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.