Home / 3,208.75-4,811.05-2,109.78

Finding the Fourth Proportional to 3,208.75, 4,811.05 and 2,109.78

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Solution

The fourth proportional to 3,208.75, 4,811.05 and 2,109.78 is: 3,163.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,208.75 : 4,811.05 = 2,109.78 : x
  2. Step 2: Convert to fraction form
    3,208.75/4,811.05 = 2,109.78/x
  3. Step 3: Cross multiply
    3,208.75x = 4,811.05 × 2,109.78
  4. Step 4: Simplify right side
    3,208.75x = 10,150,247.84
  5. Step 5: Solve for x
    x = 10,150,247.84/3,208.75
  6. Step 6: Final answer
    x = 3,163.31

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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.