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Finding the Fourth Proportional to 639.47, 963.22 and 630.97

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Solution

The fourth proportional to 639.47, 963.22 and 630.97 is: 950.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.47 : 963.22 = 630.97 : x
  2. Step 2: Convert to fraction form
    639.47/963.22 = 630.97/x
  3. Step 3: Cross multiply
    639.47x = 963.22 × 630.97
  4. Step 4: Simplify right side
    639.47x = 607,762.92
  5. Step 5: Solve for x
    x = 607,762.92/639.47
  6. Step 6: Final answer
    x = 950.42

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.