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Finding the Third Proportional to 379.48 and 817.17

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Solution

The third proportional to 379.48 and 817.17 is: 1,759.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.48 : 817.17 = 817.17 : x
  2. Step 2: Convert to fraction form
    379.48/817.17 = 817.17/x
  3. Step 3: Cross multiply
    379.48x = 817.17 × 817.17
  4. Step 4: Simplify right side
    379.48x = 667,769.87
  5. Step 5: Solve for x
    x = 667,769.87/379.48
  6. Step 6: Final answer
    x = 1,759.71

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.