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Finding the Third Proportional to 2,772 and 3,897

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Solution

The third proportional to 2,772 and 3,897 is: 5,478.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,772 : 3,897 = 3,897 : x
  2. Step 2: Convert to fraction form
    2,772/3,897 = 3,897/x
  3. Step 3: Cross multiply
    2,772x = 3,897 × 3,897
  4. Step 4: Simplify right side
    2,772x = 15,186,609
  5. Step 5: Solve for x
    x = 15,186,609/2,772
  6. Step 6: Final answer
    x = 5,478.57

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.