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Finding the Third Proportional to 2,936 and 3,912

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Solution

The third proportional to 2,936 and 3,912 is: 5,212.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,936 : 3,912 = 3,912 : x
  2. Step 2: Convert to fraction form
    2,936/3,912 = 3,912/x
  3. Step 3: Cross multiply
    2,936x = 3,912 × 3,912
  4. Step 4: Simplify right side
    2,936x = 15,303,744
  5. Step 5: Solve for x
    x = 15,303,744/2,936
  6. Step 6: Final answer
    x = 5,212.45

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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.