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Finding the Fourth Proportional to 629.49, 866.82 and 518.78

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Solution

The fourth proportional to 629.49, 866.82 and 518.78 is: 714.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.49 : 866.82 = 518.78 : x
  2. Step 2: Convert to fraction form
    629.49/866.82 = 518.78/x
  3. Step 3: Cross multiply
    629.49x = 866.82 × 518.78
  4. Step 4: Simplify right side
    629.49x = 449,685.20
  5. Step 5: Solve for x
    x = 449,685.20/629.49
  6. Step 6: Final answer
    x = 714.36

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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.