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Finding the Third Proportional to 865.69 and 980.44

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Solution

The third proportional to 865.69 and 980.44 is: 1,110.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    865.69 : 980.44 = 980.44 : x
  2. Step 2: Convert to fraction form
    865.69/980.44 = 980.44/x
  3. Step 3: Cross multiply
    865.69x = 980.44 × 980.44
  4. Step 4: Simplify right side
    865.69x = 961,257.69
  5. Step 5: Solve for x
    x = 961,257.69/865.69
  6. Step 6: Final answer
    x = 1,110.40

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Why These Related Problems?

These problems maintain the same ratio (1.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.