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Finding the Fourth Proportional to 642.97, 888.27 and 422.44

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Solution

The fourth proportional to 642.97, 888.27 and 422.44 is: 583.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    642.97 : 888.27 = 422.44 : x
  2. Step 2: Convert to fraction form
    642.97/888.27 = 422.44/x
  3. Step 3: Cross multiply
    642.97x = 888.27 × 422.44
  4. Step 4: Simplify right side
    642.97x = 375,240.78
  5. Step 5: Solve for x
    x = 375,240.78/642.97
  6. Step 6: Final answer
    x = 583.61

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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.