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Finding the Third Proportional to 1,257.50 and 2,767

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Solution

The third proportional to 1,257.50 and 2,767 is: 6,088.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,257.50 : 2,767 = 2,767 : x
  2. Step 2: Convert to fraction form
    1,257.50/2,767 = 2,767/x
  3. Step 3: Cross multiply
    1,257.50x = 2,767 × 2,767
  4. Step 4: Simplify right side
    1,257.50x = 7,656,289
  5. Step 5: Solve for x
    x = 7,656,289/1,257.50
  6. Step 6: Final answer
    x = 6,088.50

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.