Home / 3,811.28-5,714.04-1,212.72

Finding the Fourth Proportional to 3,811.28, 5,714.04 and 1,212.72

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Solution

The fourth proportional to 3,811.28, 5,714.04 and 1,212.72 is: 1,818.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,811.28 : 5,714.04 = 1,212.72 : x
  2. Step 2: Convert to fraction form
    3,811.28/5,714.04 = 1,212.72/x
  3. Step 3: Cross multiply
    3,811.28x = 5,714.04 × 1,212.72
  4. Step 4: Simplify right side
    3,811.28x = 6,929,530.59
  5. Step 5: Solve for x
    x = 6,929,530.59/3,811.28
  6. Step 6: Final answer
    x = 1,818.16

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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.