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Finding the Third Proportional to 827.72 and 1,072.62

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Solution

The third proportional to 827.72 and 1,072.62 is: 1,389.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    827.72 : 1,072.62 = 1,072.62 : x
  2. Step 2: Convert to fraction form
    827.72/1,072.62 = 1,072.62/x
  3. Step 3: Cross multiply
    827.72x = 1,072.62 × 1,072.62
  4. Step 4: Simplify right side
    827.72x = 1,150,507.63
  5. Step 5: Solve for x
    x = 1,150,507.63/827.72
  6. Step 6: Final answer
    x = 1,389.97

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Why These Related Problems?

These problems maintain the same ratio (1.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.