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Finding the Third Proportional to 991 and 2,677

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Solution

The third proportional to 991 and 2,677 is: 7,231.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    991 : 2,677 = 2,677 : x
  2. Step 2: Convert to fraction form
    991/2,677 = 2,677/x
  3. Step 3: Cross multiply
    991x = 2,677 × 2,677
  4. Step 4: Simplify right side
    991x = 7,166,329
  5. Step 5: Solve for x
    x = 7,166,329/991
  6. Step 6: Final answer
    x = 7,231.41

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Why These Related Problems?

These problems maintain the same ratio (2.70) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.