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Finding the Third Proportional to 874.50 and 1,867

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Solution

The third proportional to 874.50 and 1,867 is: 3,985.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    874.50 : 1,867 = 1,867 : x
  2. Step 2: Convert to fraction form
    874.50/1,867 = 1,867/x
  3. Step 3: Cross multiply
    874.50x = 1,867 × 1,867
  4. Step 4: Simplify right side
    874.50x = 3,485,689
  5. Step 5: Solve for x
    x = 3,485,689/874.50
  6. Step 6: Final answer
    x = 3,985.92

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.