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Finding the Third Proportional to 827.44 and 1,279.69

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Solution

The third proportional to 827.44 and 1,279.69 is: 1,979.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    827.44 : 1,279.69 = 1,279.69 : x
  2. Step 2: Convert to fraction form
    827.44/1,279.69 = 1,279.69/x
  3. Step 3: Cross multiply
    827.44x = 1,279.69 × 1,279.69
  4. Step 4: Simplify right side
    827.44x = 1,637,600.10
  5. Step 5: Solve for x
    x = 1,637,600.10/827.44
  6. Step 6: Final answer
    x = 1,979.12

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.