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Finding the Third Proportional to 1,638.75 and 4,295.25

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Solution

The third proportional to 1,638.75 and 4,295.25 is: 11,258.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.75 : 4,295.25 = 4,295.25 : x
  2. Step 2: Convert to fraction form
    1,638.75/4,295.25 = 4,295.25/x
  3. Step 3: Cross multiply
    1,638.75x = 4,295.25 × 4,295.25
  4. Step 4: Simplify right side
    1,638.75x = 18,449,172.56
  5. Step 5: Solve for x
    x = 18,449,172.56/1,638.75
  6. Step 6: Final answer
    x = 11,258.08

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Why These Related Problems?

These problems maintain the same ratio (2.62) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.