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Finding the Third Proportional to 3,306 and 5,140

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Solution

The third proportional to 3,306 and 5,140 is: 7,991.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,306 : 5,140 = 5,140 : x
  2. Step 2: Convert to fraction form
    3,306/5,140 = 5,140/x
  3. Step 3: Cross multiply
    3,306x = 5,140 × 5,140
  4. Step 4: Simplify right side
    3,306x = 26,419,600
  5. Step 5: Solve for x
    x = 26,419,600/3,306
  6. Step 6: Final answer
    x = 7,991.41

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.