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Finding the Third Proportional to 872 and 1,862

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Solution

The third proportional to 872 and 1,862 is: 3,975.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    872 : 1,862 = 1,862 : x
  2. Step 2: Convert to fraction form
    872/1,862 = 1,862/x
  3. Step 3: Cross multiply
    872x = 1,862 × 1,862
  4. Step 4: Simplify right side
    872x = 3,467,044
  5. Step 5: Solve for x
    x = 3,467,044/872
  6. Step 6: Final answer
    x = 3,975.97

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.