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Finding the Fourth Proportional to 635.28, 876.96 and 495.78

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Solution

The fourth proportional to 635.28, 876.96 and 495.78 is: 684.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.28 : 876.96 = 495.78 : x
  2. Step 2: Convert to fraction form
    635.28/876.96 = 495.78/x
  3. Step 3: Cross multiply
    635.28x = 876.96 × 495.78
  4. Step 4: Simplify right side
    635.28x = 434,779.23
  5. Step 5: Solve for x
    x = 434,779.23/635.28
  6. Step 6: Final answer
    x = 684.39

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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.