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Finding the Fourth Proportional to 447.29, 671.96 and 428.84

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Solution

The fourth proportional to 447.29, 671.96 and 428.84 is: 644.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.29 : 671.96 = 428.84 : x
  2. Step 2: Convert to fraction form
    447.29/671.96 = 428.84/x
  3. Step 3: Cross multiply
    447.29x = 671.96 × 428.84
  4. Step 4: Simplify right side
    447.29x = 288,167.34
  5. Step 5: Solve for x
    x = 288,167.34/447.29
  6. Step 6: Final answer
    x = 644.25

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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.