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Finding the Third Proportional to 447.38 and 979.13

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Solution

The third proportional to 447.38 and 979.13 is: 2,142.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.38 : 979.13 = 979.13 : x
  2. Step 2: Convert to fraction form
    447.38/979.13 = 979.13/x
  3. Step 3: Cross multiply
    447.38x = 979.13 × 979.13
  4. Step 4: Simplify right side
    447.38x = 958,685.77
  5. Step 5: Solve for x
    x = 958,685.77/447.38
  6. Step 6: Final answer
    x = 2,142.91

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.