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Finding the Third Proportional to 639.62 and 956.97

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Solution

The third proportional to 639.62 and 956.97 is: 1,431.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.62 : 956.97 = 956.97 : x
  2. Step 2: Convert to fraction form
    639.62/956.97 = 956.97/x
  3. Step 3: Cross multiply
    639.62x = 956.97 × 956.97
  4. Step 4: Simplify right side
    639.62x = 915,792.93
  5. Step 5: Solve for x
    x = 915,792.93/639.62
  6. Step 6: Final answer
    x = 1,431.79

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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.