Home / 2,811.12-4,217.78-1,079.36

Finding the Fourth Proportional to 2,811.12, 4,217.78 and 1,079.36

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Solution

The fourth proportional to 2,811.12, 4,217.78 and 1,079.36 is: 1,619.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.12 : 4,217.78 = 1,079.36 : x
  2. Step 2: Convert to fraction form
    2,811.12/4,217.78 = 1,079.36/x
  3. Step 3: Cross multiply
    2,811.12x = 4,217.78 × 1,079.36
  4. Step 4: Simplify right side
    2,811.12x = 4,552,503.02
  5. Step 5: Solve for x
    x = 4,552,503.02/2,811.12
  6. Step 6: Final answer
    x = 1,619.46

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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.