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Finding the Fourth Proportional to 372.15, 513.69 and 247.92

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Solution

The fourth proportional to 372.15, 513.69 and 247.92 is: 342.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.15 : 513.69 = 247.92 : x
  2. Step 2: Convert to fraction form
    372.15/513.69 = 247.92/x
  3. Step 3: Cross multiply
    372.15x = 513.69 × 247.92
  4. Step 4: Simplify right side
    372.15x = 127,354.02
  5. Step 5: Solve for x
    x = 127,354.02/372.15
  6. Step 6: Final answer
    x = 342.21

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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.