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Finding the Fourth Proportional to 629.20, 868.04 and 454.16

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Solution

The fourth proportional to 629.20, 868.04 and 454.16 is: 626.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.20 : 868.04 = 454.16 : x
  2. Step 2: Convert to fraction form
    629.20/868.04 = 454.16/x
  3. Step 3: Cross multiply
    629.20x = 868.04 × 454.16
  4. Step 4: Simplify right side
    629.20x = 394,229.05
  5. Step 5: Solve for x
    x = 394,229.05/629.20
  6. Step 6: Final answer
    x = 626.56

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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.