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Finding the Third Proportional to 1,213.75 and 2,647.75

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Solution

The third proportional to 1,213.75 and 2,647.75 is: 5,775.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213.75 : 2,647.75 = 2,647.75 : x
  2. Step 2: Convert to fraction form
    1,213.75/2,647.75 = 2,647.75/x
  3. Step 3: Cross multiply
    1,213.75x = 2,647.75 × 2,647.75
  4. Step 4: Simplify right side
    1,213.75x = 7,010,580.06
  5. Step 5: Solve for x
    x = 7,010,580.06/1,213.75
  6. Step 6: Final answer
    x = 5,775.97

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.