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Finding the Fourth Proportional to 671.11, 926.39 and 449.98

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Solution

The fourth proportional to 671.11, 926.39 and 449.98 is: 621.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.11 : 926.39 = 449.98 : x
  2. Step 2: Convert to fraction form
    671.11/926.39 = 449.98/x
  3. Step 3: Cross multiply
    671.11x = 926.39 × 449.98
  4. Step 4: Simplify right side
    671.11x = 416,856.97
  5. Step 5: Solve for x
    x = 416,856.97/671.11
  6. Step 6: Final answer
    x = 621.15

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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.