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Finding the Third Proportional to 2,770 and 7,489

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Solution

The third proportional to 2,770 and 7,489 is: 20,247.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,770 : 7,489 = 7,489 : x
  2. Step 2: Convert to fraction form
    2,770/7,489 = 7,489/x
  3. Step 3: Cross multiply
    2,770x = 7,489 × 7,489
  4. Step 4: Simplify right side
    2,770x = 56,085,121
  5. Step 5: Solve for x
    x = 56,085,121/2,770
  6. Step 6: Final answer
    x = 20,247.34

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Why These Related Problems?

These problems maintain the same ratio (2.70) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.