Home / 2,272.18-3,408.72-811.29

Finding the Fourth Proportional to 2,272.18, 3,408.72 and 811.29

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Solution

The fourth proportional to 2,272.18, 3,408.72 and 811.29 is: 1,217.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,272.18 : 3,408.72 = 811.29 : x
  2. Step 2: Convert to fraction form
    2,272.18/3,408.72 = 811.29/x
  3. Step 3: Cross multiply
    2,272.18x = 3,408.72 × 811.29
  4. Step 4: Simplify right side
    2,272.18x = 2,765,471.00
  5. Step 5: Solve for x
    x = 2,765,471.00/2,272.18
  6. Step 6: Final answer
    x = 1,217.10

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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.