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Finding the Third Proportional to 861.25 and 1,343

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Solution

The third proportional to 861.25 and 1,343 is: 2,094.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    861.25 : 1,343 = 1,343 : x
  2. Step 2: Convert to fraction form
    861.25/1,343 = 1,343/x
  3. Step 3: Cross multiply
    861.25x = 1,343 × 1,343
  4. Step 4: Simplify right side
    861.25x = 1,803,649
  5. Step 5: Solve for x
    x = 1,803,649/861.25
  6. Step 6: Final answer
    x = 2,094.22

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.