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Finding the Third Proportional to 1,638 and 3,539.25

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Solution

The third proportional to 1,638 and 3,539.25 is: 7,647.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638 : 3,539.25 = 3,539.25 : x
  2. Step 2: Convert to fraction form
    1,638/3,539.25 = 3,539.25/x
  3. Step 3: Cross multiply
    1,638x = 3,539.25 × 3,539.25
  4. Step 4: Simplify right side
    1,638x = 12,526,290.56
  5. Step 5: Solve for x
    x = 12,526,290.56/1,638
  6. Step 6: Final answer
    x = 7,647.31

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.