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Finding the Third Proportional to 1,638 and 3,427.88

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Solution

The third proportional to 1,638 and 3,427.88 is: 7,173.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638 : 3,427.88 = 3,427.88 : x
  2. Step 2: Convert to fraction form
    1,638/3,427.88 = 3,427.88/x
  3. Step 3: Cross multiply
    1,638x = 3,427.88 × 3,427.88
  4. Step 4: Simplify right side
    1,638x = 11,750,327.02
  5. Step 5: Solve for x
    x = 11,750,327.02/1,638
  6. Step 6: Final answer
    x = 7,173.58

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Why These Related Problems?

These problems maintain the same ratio (2.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.