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Finding the Fourth Proportional to 425.88, 636.30 and 411.54

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Solution

The fourth proportional to 425.88, 636.30 and 411.54 is: 614.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.88 : 636.30 = 411.54 : x
  2. Step 2: Convert to fraction form
    425.88/636.30 = 411.54/x
  3. Step 3: Cross multiply
    425.88x = 636.30 × 411.54
  4. Step 4: Simplify right side
    425.88x = 261,862.90
  5. Step 5: Solve for x
    x = 261,862.90/425.88
  6. Step 6: Final answer
    x = 614.87

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.