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Finding the Third Proportional to 874 and 1,916

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Solution

The third proportional to 874 and 1,916 is: 4,200.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    874 : 1,916 = 1,916 : x
  2. Step 2: Convert to fraction form
    874/1,916 = 1,916/x
  3. Step 3: Cross multiply
    874x = 1,916 × 1,916
  4. Step 4: Simplify right side
    874x = 3,671,056
  5. Step 5: Solve for x
    x = 3,671,056/874
  6. Step 6: Final answer
    x = 4,200.29

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.