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Finding the Fourth Proportional to 629.27, 868.38 and 440.48

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Solution

The fourth proportional to 629.27, 868.38 and 440.48 is: 607.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.27 : 868.38 = 440.48 : x
  2. Step 2: Convert to fraction form
    629.27/868.38 = 440.48/x
  3. Step 3: Cross multiply
    629.27x = 868.38 × 440.48
  4. Step 4: Simplify right side
    629.27x = 382,499.68
  5. Step 5: Solve for x
    x = 382,499.68/629.27
  6. Step 6: Final answer
    x = 607.85

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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.