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Finding the Third Proportional to 1,720 and 1,843

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Solution

The third proportional to 1,720 and 1,843 is: 1,974.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,720 : 1,843 = 1,843 : x
  2. Step 2: Convert to fraction form
    1,720/1,843 = 1,843/x
  3. Step 3: Cross multiply
    1,720x = 1,843 × 1,843
  4. Step 4: Simplify right side
    1,720x = 3,396,649
  5. Step 5: Solve for x
    x = 3,396,649/1,720
  6. Step 6: Final answer
    x = 1,974.80

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Why These Related Problems?

These problems maintain the same ratio (1.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.