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Finding the Third Proportional to 3,091 and 3,331

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Solution

The third proportional to 3,091 and 3,331 is: 3,589.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,091 : 3,331 = 3,331 : x
  2. Step 2: Convert to fraction form
    3,091/3,331 = 3,331/x
  3. Step 3: Cross multiply
    3,091x = 3,331 × 3,331
  4. Step 4: Simplify right side
    3,091x = 11,095,561
  5. Step 5: Solve for x
    x = 11,095,561/3,091
  6. Step 6: Final answer
    x = 3,589.63

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Why These Related Problems?

These problems maintain the same ratio (1.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.