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Finding the Fourth Proportional to 635.27, 878.28 and 469.22

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Solution

The fourth proportional to 635.27, 878.28 and 469.22 is: 648.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.27 : 878.28 = 469.22 : x
  2. Step 2: Convert to fraction form
    635.27/878.28 = 469.22/x
  3. Step 3: Cross multiply
    635.27x = 878.28 × 469.22
  4. Step 4: Simplify right side
    635.27x = 412,108.74
  5. Step 5: Solve for x
    x = 412,108.74/635.27
  6. Step 6: Final answer
    x = 648.71

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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.