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Finding the Third Proportional to 1,474 and 3,921

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Solution

The third proportional to 1,474 and 3,921 is: 10,430.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,474 : 3,921 = 3,921 : x
  2. Step 2: Convert to fraction form
    1,474/3,921 = 3,921/x
  3. Step 3: Cross multiply
    1,474x = 3,921 × 3,921
  4. Step 4: Simplify right side
    1,474x = 15,374,241
  5. Step 5: Solve for x
    x = 15,374,241/1,474
  6. Step 6: Final answer
    x = 10,430.29

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Why These Related Problems?

These problems maintain the same ratio (2.66) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.