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Finding the Third Proportional to 676.69 and 1,615.78

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Solution

The third proportional to 676.69 and 1,615.78 is: 3,858.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.69 : 1,615.78 = 1,615.78 : x
  2. Step 2: Convert to fraction form
    676.69/1,615.78 = 1,615.78/x
  3. Step 3: Cross multiply
    676.69x = 1,615.78 × 1,615.78
  4. Step 4: Simplify right side
    676.69x = 2,610,749.05
  5. Step 5: Solve for x
    x = 2,610,749.05/676.69
  6. Step 6: Final answer
    x = 3,858.13

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Why These Related Problems?

These problems maintain the same ratio (2.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.