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Finding the Fourth Proportional to 625.28, 861.72 and 450.32

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Solution

The fourth proportional to 625.28, 861.72 and 450.32 is: 620.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.28 : 861.72 = 450.32 : x
  2. Step 2: Convert to fraction form
    625.28/861.72 = 450.32/x
  3. Step 3: Cross multiply
    625.28x = 861.72 × 450.32
  4. Step 4: Simplify right side
    625.28x = 388,049.75
  5. Step 5: Solve for x
    x = 388,049.75/625.28
  6. Step 6: Final answer
    x = 620.60

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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.