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Finding the Fourth Proportional to 447.98, 671.96 and 426.11

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Solution

The fourth proportional to 447.98, 671.96 and 426.11 is: 639.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.98 : 671.96 = 426.11 : x
  2. Step 2: Convert to fraction form
    447.98/671.96 = 426.11/x
  3. Step 3: Cross multiply
    447.98x = 671.96 × 426.11
  4. Step 4: Simplify right side
    447.98x = 286,326.58
  5. Step 5: Solve for x
    x = 286,326.58/447.98
  6. Step 6: Final answer
    x = 639.16

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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.