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Finding the Fourth Proportional to 422.73, 634.68 and 286.02

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Solution

The fourth proportional to 422.73, 634.68 and 286.02 is: 429.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.73 : 634.68 = 286.02 : x
  2. Step 2: Convert to fraction form
    422.73/634.68 = 286.02/x
  3. Step 3: Cross multiply
    422.73x = 634.68 × 286.02
  4. Step 4: Simplify right side
    422.73x = 181,531.17
  5. Step 5: Solve for x
    x = 181,531.17/422.73
  6. Step 6: Final answer
    x = 429.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.