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Finding the Third Proportional to 1,392.75 and 2,745.84

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Solution

The third proportional to 1,392.75 and 2,745.84 is: 5,413.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392.75 : 2,745.84 = 2,745.84 : x
  2. Step 2: Convert to fraction form
    1,392.75/2,745.84 = 2,745.84/x
  3. Step 3: Cross multiply
    1,392.75x = 2,745.84 × 2,745.84
  4. Step 4: Simplify right side
    1,392.75x = 7,539,657.90
  5. Step 5: Solve for x
    x = 7,539,657.90/1,392.75
  6. Step 6: Final answer
    x = 5,413.50

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Why These Related Problems?

These problems maintain the same ratio (1.97) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.