Home / 2,121.82-3,179.48-1,080.26

Finding the Fourth Proportional to 2,121.82, 3,179.48 and 1,080.26

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Solution

The fourth proportional to 2,121.82, 3,179.48 and 1,080.26 is: 1,618.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.82 : 3,179.48 = 1,080.26 : x
  2. Step 2: Convert to fraction form
    2,121.82/3,179.48 = 1,080.26/x
  3. Step 3: Cross multiply
    2,121.82x = 3,179.48 × 1,080.26
  4. Step 4: Simplify right side
    2,121.82x = 3,434,659.66
  5. Step 5: Solve for x
    x = 3,434,659.66/2,121.82
  6. Step 6: Final answer
    x = 1,618.74

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1.5x scale

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.