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Finding the Third Proportional to 861.50 and 1,723

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Solution

The third proportional to 861.50 and 1,723 is: 3,446

Step by Step Solution

  1. Step 1: Write the proportion equation
    861.50 : 1,723 = 1,723 : x
  2. Step 2: Convert to fraction form
    861.50/1,723 = 1,723/x
  3. Step 3: Cross multiply
    861.50x = 1,723 × 1,723
  4. Step 4: Simplify right side
    861.50x = 2,968,729
  5. Step 5: Solve for x
    x = 2,968,729/861.50
  6. Step 6: Final answer
    x = 3,446

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Why These Related Problems?

These problems maintain the same ratio (2) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.