Home / 2,120.92-3,181.38-581.92

Finding the Fourth Proportional to 2,120.92, 3,181.38 and 581.92

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Solution

The fourth proportional to 2,120.92, 3,181.38 and 581.92 is: 872.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.92 : 3,181.38 = 581.92 : x
  2. Step 2: Convert to fraction form
    2,120.92/3,181.38 = 581.92/x
  3. Step 3: Cross multiply
    2,120.92x = 3,181.38 × 581.92
  4. Step 4: Simplify right side
    2,120.92x = 1,851,308.65
  5. Step 5: Solve for x
    x = 1,851,308.65/2,120.92
  6. Step 6: Final answer
    x = 872.88

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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.