Home / 2,618.97-3,928.43-1,645.75

Finding the Fourth Proportional to 2,618.97, 3,928.43 and 1,645.75

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Solution

The fourth proportional to 2,618.97, 3,928.43 and 1,645.75 is: 2,468.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,618.97 : 3,928.43 = 1,645.75 : x
  2. Step 2: Convert to fraction form
    2,618.97/3,928.43 = 1,645.75/x
  3. Step 3: Cross multiply
    2,618.97x = 3,928.43 × 1,645.75
  4. Step 4: Simplify right side
    2,618.97x = 6,465,213.67
  5. Step 5: Solve for x
    x = 6,465,213.67/2,618.97
  6. Step 6: Final answer
    x = 2,468.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.