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Finding the Third Proportional to 1,191 and 3,100

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Solution

The third proportional to 1,191 and 3,100 is: 8,068.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,191 : 3,100 = 3,100 : x
  2. Step 2: Convert to fraction form
    1,191/3,100 = 3,100/x
  3. Step 3: Cross multiply
    1,191x = 3,100 × 3,100
  4. Step 4: Simplify right side
    1,191x = 9,610,000
  5. Step 5: Solve for x
    x = 9,610,000/1,191
  6. Step 6: Final answer
    x = 8,068.85

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Why These Related Problems?

These problems maintain the same ratio (2.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.