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Finding the Third Proportional to 992 and 2,087

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Solution

The third proportional to 992 and 2,087 is: 4,390.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    992 : 2,087 = 2,087 : x
  2. Step 2: Convert to fraction form
    992/2,087 = 2,087/x
  3. Step 3: Cross multiply
    992x = 2,087 × 2,087
  4. Step 4: Simplify right side
    992x = 4,355,569
  5. Step 5: Solve for x
    x = 4,355,569/992
  6. Step 6: Final answer
    x = 4,390.69

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.