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Finding the Third Proportional to 1,638 and 2,486.81

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Solution

The third proportional to 1,638 and 2,486.81 is: 3,775.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638 : 2,486.81 = 2,486.81 : x
  2. Step 2: Convert to fraction form
    1,638/2,486.81 = 2,486.81/x
  3. Step 3: Cross multiply
    1,638x = 2,486.81 × 2,486.81
  4. Step 4: Simplify right side
    1,638x = 6,184,236.41
  5. Step 5: Solve for x
    x = 6,184,236.41/1,638
  6. Step 6: Final answer
    x = 3,775.48

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.