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Finding the Third Proportional to 422.75 and 866.50

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Solution

The third proportional to 422.75 and 866.50 is: 1,776.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.75 : 866.50 = 866.50 : x
  2. Step 2: Convert to fraction form
    422.75/866.50 = 866.50/x
  3. Step 3: Cross multiply
    422.75x = 866.50 × 866.50
  4. Step 4: Simplify right side
    422.75x = 750,822.25
  5. Step 5: Solve for x
    x = 750,822.25/422.75
  6. Step 6: Final answer
    x = 1,776.04

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.