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Finding the Third Proportional to 3,912 and 5,208

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Solution

The third proportional to 3,912 and 5,208 is: 6,933.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,912 : 5,208 = 5,208 : x
  2. Step 2: Convert to fraction form
    3,912/5,208 = 5,208/x
  3. Step 3: Cross multiply
    3,912x = 5,208 × 5,208
  4. Step 4: Simplify right side
    3,912x = 27,123,264
  5. Step 5: Solve for x
    x = 27,123,264/3,912
  6. Step 6: Final answer
    x = 6,933.35

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.