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Finding the Fourth Proportional to 372.17, 513.91 and 247.78

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Solution

The fourth proportional to 372.17, 513.91 and 247.78 is: 342.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.17 : 513.91 = 247.78 : x
  2. Step 2: Convert to fraction form
    372.17/513.91 = 247.78/x
  3. Step 3: Cross multiply
    372.17x = 513.91 × 247.78
  4. Step 4: Simplify right side
    372.17x = 127,337.97
  5. Step 5: Solve for x
    x = 127,337.97/372.17
  6. Step 6: Final answer
    x = 342.15

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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.