Home / 2,120.56-3,181.04-1,080.12

Finding the Fourth Proportional to 2,120.56, 3,181.04 and 1,080.12

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Solution

The fourth proportional to 2,120.56, 3,181.04 and 1,080.12 is: 1,620.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.56 : 3,181.04 = 1,080.12 : x
  2. Step 2: Convert to fraction form
    2,120.56/3,181.04 = 1,080.12/x
  3. Step 3: Cross multiply
    2,120.56x = 3,181.04 × 1,080.12
  4. Step 4: Simplify right side
    2,120.56x = 3,435,904.92
  5. Step 5: Solve for x
    x = 3,435,904.92/2,120.56
  6. Step 6: Final answer
    x = 1,620.28

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Half scale
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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.