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Finding the Fourth Proportional to 629.05, 868.17 and 481.63

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Solution

The fourth proportional to 629.05, 868.17 and 481.63 is: 664.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.05 : 868.17 = 481.63 : x
  2. Step 2: Convert to fraction form
    629.05/868.17 = 481.63/x
  3. Step 3: Cross multiply
    629.05x = 868.17 × 481.63
  4. Step 4: Simplify right side
    629.05x = 418,136.72
  5. Step 5: Solve for x
    x = 418,136.72/629.05
  6. Step 6: Final answer
    x = 664.71

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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.