Home / 2,811.22-4,213.20-1,511.20

Finding the Fourth Proportional to 2,811.22, 4,213.20 and 1,511.20

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Solution

The fourth proportional to 2,811.22, 4,213.20 and 1,511.20 is: 2,264.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.22 : 4,213.20 = 1,511.20 : x
  2. Step 2: Convert to fraction form
    2,811.22/4,213.20 = 1,511.20/x
  3. Step 3: Cross multiply
    2,811.22x = 4,213.20 × 1,511.20
  4. Step 4: Simplify right side
    2,811.22x = 6,366,987.84
  5. Step 5: Solve for x
    x = 6,366,987.84/2,811.22
  6. Step 6: Final answer
    x = 2,264.85

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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.