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Finding the Third Proportional to 1,917 and 3,231

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Solution

The third proportional to 1,917 and 3,231 is: 5,445.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,917 : 3,231 = 3,231 : x
  2. Step 2: Convert to fraction form
    1,917/3,231 = 3,231/x
  3. Step 3: Cross multiply
    1,917x = 3,231 × 3,231
  4. Step 4: Simplify right side
    1,917x = 10,439,361
  5. Step 5: Solve for x
    x = 10,439,361/1,917
  6. Step 6: Final answer
    x = 5,445.68

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Why These Related Problems?

These problems maintain the same ratio (1.69) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.