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Finding the Third Proportional to 3,560 and 3,872

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Solution

The third proportional to 3,560 and 3,872 is: 4,211.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,560 : 3,872 = 3,872 : x
  2. Step 2: Convert to fraction form
    3,560/3,872 = 3,872/x
  3. Step 3: Cross multiply
    3,560x = 3,872 × 3,872
  4. Step 4: Simplify right side
    3,560x = 14,992,384
  5. Step 5: Solve for x
    x = 14,992,384/3,560
  6. Step 6: Final answer
    x = 4,211.34

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Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.