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Finding the Third Proportional to 2,660 and 2,900

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Solution

The third proportional to 2,660 and 2,900 is: 3,161.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,660 : 2,900 = 2,900 : x
  2. Step 2: Convert to fraction form
    2,660/2,900 = 2,900/x
  3. Step 3: Cross multiply
    2,660x = 2,900 × 2,900
  4. Step 4: Simplify right side
    2,660x = 8,410,000
  5. Step 5: Solve for x
    x = 8,410,000/2,660
  6. Step 6: Final answer
    x = 3,161.65

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Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.