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Finding the Fourth Proportional to 486.88, 726.60 and 425.44

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Solution

The fourth proportional to 486.88, 726.60 and 425.44 is: 634.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.88 : 726.60 = 425.44 : x
  2. Step 2: Convert to fraction form
    486.88/726.60 = 425.44/x
  3. Step 3: Cross multiply
    486.88x = 726.60 × 425.44
  4. Step 4: Simplify right side
    486.88x = 309,124.70
  5. Step 5: Solve for x
    x = 309,124.70/486.88
  6. Step 6: Final answer
    x = 634.91

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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.