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Finding the Fourth Proportional to 410.28, 615.38 and 247.61

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Solution

The fourth proportional to 410.28, 615.38 and 247.61 is: 371.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    410.28 : 615.38 = 247.61 : x
  2. Step 2: Convert to fraction form
    410.28/615.38 = 247.61/x
  3. Step 3: Cross multiply
    410.28x = 615.38 × 247.61
  4. Step 4: Simplify right side
    410.28x = 152,369.93
  5. Step 5: Solve for x
    x = 152,369.93/410.28
  6. Step 6: Final answer
    x = 371.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.