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Finding the Fourth Proportional to 629.16, 868.51 and 393.23

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Solution

The fourth proportional to 629.16, 868.51 and 393.23 is: 542.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.16 : 868.51 = 393.23 : x
  2. Step 2: Convert to fraction form
    629.16/868.51 = 393.23/x
  3. Step 3: Cross multiply
    629.16x = 868.51 × 393.23
  4. Step 4: Simplify right side
    629.16x = 341,524.19
  5. Step 5: Solve for x
    x = 341,524.19/629.16
  6. Step 6: Final answer
    x = 542.83

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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.