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Finding the Third Proportional to 3,120 and 5,199

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Solution

The third proportional to 3,120 and 5,199 is: 8,663.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120 : 5,199 = 5,199 : x
  2. Step 2: Convert to fraction form
    3,120/5,199 = 5,199/x
  3. Step 3: Cross multiply
    3,120x = 5,199 × 5,199
  4. Step 4: Simplify right side
    3,120x = 27,029,601
  5. Step 5: Solve for x
    x = 27,029,601/3,120
  6. Step 6: Final answer
    x = 8,663.33

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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.