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Finding the Fourth Proportional to 629.88, 869.24 and 353.88

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Solution

The fourth proportional to 629.88, 869.24 and 353.88 is: 488.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.88 : 869.24 = 353.88 : x
  2. Step 2: Convert to fraction form
    629.88/869.24 = 353.88/x
  3. Step 3: Cross multiply
    629.88x = 869.24 × 353.88
  4. Step 4: Simplify right side
    629.88x = 307,606.65
  5. Step 5: Solve for x
    x = 307,606.65/629.88
  6. Step 6: Final answer
    x = 488.36

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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.