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Finding the Third Proportional to 1,422.40 and 2,988.97

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Solution

The third proportional to 1,422.40 and 2,988.97 is: 6,280.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,422.40 : 2,988.97 = 2,988.97 : x
  2. Step 2: Convert to fraction form
    1,422.40/2,988.97 = 2,988.97/x
  3. Step 3: Cross multiply
    1,422.40x = 2,988.97 × 2,988.97
  4. Step 4: Simplify right side
    1,422.40x = 8,933,948.78
  5. Step 5: Solve for x
    x = 8,933,948.78/1,422.40
  6. Step 6: Final answer
    x = 6,280.88

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.