Home / 3,811.25-5,709.48-2,808.78

Finding the Fourth Proportional to 3,811.25, 5,709.48 and 2,808.78

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Solution

The fourth proportional to 3,811.25, 5,709.48 and 2,808.78 is: 4,207.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,811.25 : 5,709.48 = 2,808.78 : x
  2. Step 2: Convert to fraction form
    3,811.25/5,709.48 = 2,808.78/x
  3. Step 3: Cross multiply
    3,811.25x = 5,709.48 × 2,808.78
  4. Step 4: Simplify right side
    3,811.25x = 16,036,655.45
  5. Step 5: Solve for x
    x = 16,036,655.45/3,811.25
  6. Step 6: Final answer
    x = 4,207.71

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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.