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Finding the Third Proportional to 2,668.78 and 3,988.41

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Solution

The third proportional to 2,668.78 and 3,988.41 is: 5,960.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,668.78 : 3,988.41 = 3,988.41 : x
  2. Step 2: Convert to fraction form
    2,668.78/3,988.41 = 3,988.41/x
  3. Step 3: Cross multiply
    2,668.78x = 3,988.41 × 3,988.41
  4. Step 4: Simplify right side
    2,668.78x = 15,907,384.42
  5. Step 5: Solve for x
    x = 15,907,384.42/2,668.78
  6. Step 6: Final answer
    x = 5,960.54

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.