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Finding the Third Proportional to 643.88 and 963.38

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Solution

The third proportional to 643.88 and 963.38 is: 1,441.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.88 : 963.38 = 963.38 : x
  2. Step 2: Convert to fraction form
    643.88/963.38 = 963.38/x
  3. Step 3: Cross multiply
    643.88x = 963.38 × 963.38
  4. Step 4: Simplify right side
    643.88x = 928,091.39
  5. Step 5: Solve for x
    x = 928,091.39/643.88
  6. Step 6: Final answer
    x = 1,441.42

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