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Finding the Third Proportional to 3,128.25 and 5,214.75

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Solution

The third proportional to 3,128.25 and 5,214.75 is: 8,692.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.25 : 5,214.75 = 5,214.75 : x
  2. Step 2: Convert to fraction form
    3,128.25/5,214.75 = 5,214.75/x
  3. Step 3: Cross multiply
    3,128.25x = 5,214.75 × 5,214.75
  4. Step 4: Simplify right side
    3,128.25x = 27,193,617.56
  5. Step 5: Solve for x
    x = 27,193,617.56/3,128.25
  6. Step 6: Final answer
    x = 8,692.92

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Why These Related Problems?

These problems maintain the same ratio (1.67) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.