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Finding the Third Proportional to 3,912 and 5,168

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Solution

The third proportional to 3,912 and 5,168 is: 6,827.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,912 : 5,168 = 5,168 : x
  2. Step 2: Convert to fraction form
    3,912/5,168 = 5,168/x
  3. Step 3: Cross multiply
    3,912x = 5,168 × 5,168
  4. Step 4: Simplify right side
    3,912x = 26,708,224
  5. Step 5: Solve for x
    x = 26,708,224/3,912
  6. Step 6: Final answer
    x = 6,827.26

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Why These Related Problems?

These problems maintain the same ratio (1.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.