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Finding the Fourth Proportional to 629.24, 868.87 and 408.57

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Solution

The fourth proportional to 629.24, 868.87 and 408.57 is: 564.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.24 : 868.87 = 408.57 : x
  2. Step 2: Convert to fraction form
    629.24/868.87 = 408.57/x
  3. Step 3: Cross multiply
    629.24x = 868.87 × 408.57
  4. Step 4: Simplify right side
    629.24x = 354,993.19
  5. Step 5: Solve for x
    x = 354,993.19/629.24
  6. Step 6: Final answer
    x = 564.16

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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.