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Finding the Third Proportional to 1,722 and 3,705

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Solution

The third proportional to 1,722 and 3,705 is: 7,971.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,722 : 3,705 = 3,705 : x
  2. Step 2: Convert to fraction form
    1,722/3,705 = 3,705/x
  3. Step 3: Cross multiply
    1,722x = 3,705 × 3,705
  4. Step 4: Simplify right side
    1,722x = 13,727,025
  5. Step 5: Solve for x
    x = 13,727,025/1,722
  6. Step 6: Final answer
    x = 7,971.56

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.