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Finding the Third Proportional to 611 and 814.50

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Solution

The third proportional to 611 and 814.50 is: 1,085.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    611 : 814.50 = 814.50 : x
  2. Step 2: Convert to fraction form
    611/814.50 = 814.50/x
  3. Step 3: Cross multiply
    611x = 814.50 × 814.50
  4. Step 4: Simplify right side
    611x = 663,410.25
  5. Step 5: Solve for x
    x = 663,410.25/611
  6. Step 6: Final answer
    x = 1,085.78

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.