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Finding the Third Proportional to 1,402.31 and 3,079.90

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Solution

The third proportional to 1,402.31 and 3,079.90 is: 6,764.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,402.31 : 3,079.90 = 3,079.90 : x
  2. Step 2: Convert to fraction form
    1,402.31/3,079.90 = 3,079.90/x
  3. Step 3: Cross multiply
    1,402.31x = 3,079.90 × 3,079.90
  4. Step 4: Simplify right side
    1,402.31x = 9,485,774.39
  5. Step 5: Solve for x
    x = 9,485,774.39/1,402.31
  6. Step 6: Final answer
    x = 6,764.38

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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.