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Finding the Fourth Proportional to 629.26, 868.08 and 393.05

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Solution

The fourth proportional to 629.26, 868.08 and 393.05 is: 542.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.26 : 868.08 = 393.05 : x
  2. Step 2: Convert to fraction form
    629.26/868.08 = 393.05/x
  3. Step 3: Cross multiply
    629.26x = 868.08 × 393.05
  4. Step 4: Simplify right side
    629.26x = 341,202.49
  5. Step 5: Solve for x
    x = 341,202.49/629.26
  6. Step 6: Final answer
    x = 542.23

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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.