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Finding the Third Proportional to 2,920 and 3,887

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Solution

The third proportional to 2,920 and 3,887 is: 5,174.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,920 : 3,887 = 3,887 : x
  2. Step 2: Convert to fraction form
    2,920/3,887 = 3,887/x
  3. Step 3: Cross multiply
    2,920x = 3,887 × 3,887
  4. Step 4: Simplify right side
    2,920x = 15,108,769
  5. Step 5: Solve for x
    x = 15,108,769/2,920
  6. Step 6: Final answer
    x = 5,174.24

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.