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Finding the Third Proportional to 1,107 and 1,721.25

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Solution

The third proportional to 1,107 and 1,721.25 is: 2,676.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,107 : 1,721.25 = 1,721.25 : x
  2. Step 2: Convert to fraction form
    1,107/1,721.25 = 1,721.25/x
  3. Step 3: Cross multiply
    1,107x = 1,721.25 × 1,721.25
  4. Step 4: Simplify right side
    1,107x = 2,962,701.56
  5. Step 5: Solve for x
    x = 2,962,701.56/1,107
  6. Step 6: Final answer
    x = 2,676.33

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.