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Finding the Third Proportional to 4,992 and 5,520

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Solution

The third proportional to 4,992 and 5,520 is: 6,103.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,992 : 5,520 = 5,520 : x
  2. Step 2: Convert to fraction form
    4,992/5,520 = 5,520/x
  3. Step 3: Cross multiply
    4,992x = 5,520 × 5,520
  4. Step 4: Simplify right side
    4,992x = 30,470,400
  5. Step 5: Solve for x
    x = 30,470,400/4,992
  6. Step 6: Final answer
    x = 6,103.85

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Why These Related Problems?

These problems maintain the same ratio (1.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.