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Finding the Third Proportional to 772.88 and 839.25

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Solution

The third proportional to 772.88 and 839.25 is: 911.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    772.88 : 839.25 = 839.25 : x
  2. Step 2: Convert to fraction form
    772.88/839.25 = 839.25/x
  3. Step 3: Cross multiply
    772.88x = 839.25 × 839.25
  4. Step 4: Simplify right side
    772.88x = 704,340.56
  5. Step 5: Solve for x
    x = 704,340.56/772.88
  6. Step 6: Final answer
    x = 911.33

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Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.