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Finding the Third Proportional to 636.75 and 867.09

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Solution

The third proportional to 636.75 and 867.09 is: 1,180.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.75 : 867.09 = 867.09 : x
  2. Step 2: Convert to fraction form
    636.75/867.09 = 867.09/x
  3. Step 3: Cross multiply
    636.75x = 867.09 × 867.09
  4. Step 4: Simplify right side
    636.75x = 751,851.57
  5. Step 5: Solve for x
    x = 751,851.57/636.75
  6. Step 6: Final answer
    x = 1,180.76

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.