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Finding the Third Proportional to 1,427.20 and 2,135.53

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Solution

The third proportional to 1,427.20 and 2,135.53 is: 3,195.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,427.20 : 2,135.53 = 2,135.53 : x
  2. Step 2: Convert to fraction form
    1,427.20/2,135.53 = 2,135.53/x
  3. Step 3: Cross multiply
    1,427.20x = 2,135.53 × 2,135.53
  4. Step 4: Simplify right side
    1,427.20x = 4,560,493.72
  5. Step 5: Solve for x
    x = 4,560,493.72/1,427.20
  6. Step 6: Final answer
    x = 3,195.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.