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Finding the Fourth Proportional to 635.97, 876.48 and 488.79

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Solution

The fourth proportional to 635.97, 876.48 and 488.79 is: 673.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.97 : 876.48 = 488.79 : x
  2. Step 2: Convert to fraction form
    635.97/876.48 = 488.79/x
  3. Step 3: Cross multiply
    635.97x = 876.48 × 488.79
  4. Step 4: Simplify right side
    635.97x = 428,414.66
  5. Step 5: Solve for x
    x = 428,414.66/635.97
  6. Step 6: Final answer
    x = 673.64

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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.