Home / 1,811.28-2,716.80-1,078.56

Finding the Fourth Proportional to 1,811.28, 2,716.80 and 1,078.56

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Solution

The fourth proportional to 1,811.28, 2,716.80 and 1,078.56 is: 1,617.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,811.28 : 2,716.80 = 1,078.56 : x
  2. Step 2: Convert to fraction form
    1,811.28/2,716.80 = 1,078.56/x
  3. Step 3: Cross multiply
    1,811.28x = 2,716.80 × 1,078.56
  4. Step 4: Simplify right side
    1,811.28x = 2,930,231.81
  5. Step 5: Solve for x
    x = 2,930,231.81/1,811.28
  6. Step 6: Final answer
    x = 1,617.77

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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.