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Finding the Third Proportional to 3,920 and 6,071

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Solution

The third proportional to 3,920 and 6,071 is: 9,402.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,920 : 6,071 = 6,071 : x
  2. Step 2: Convert to fraction form
    3,920/6,071 = 6,071/x
  3. Step 3: Cross multiply
    3,920x = 6,071 × 6,071
  4. Step 4: Simplify right side
    3,920x = 36,857,041
  5. Step 5: Solve for x
    x = 36,857,041/3,920
  6. Step 6: Final answer
    x = 9,402.31

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.