Home / 2,080.20-3,120.30-1,258.05

Finding the Fourth Proportional to 2,080.20, 3,120.30 and 1,258.05

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Solution

The fourth proportional to 2,080.20, 3,120.30 and 1,258.05 is: 1,887.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,080.20 : 3,120.30 = 1,258.05 : x
  2. Step 2: Convert to fraction form
    2,080.20/3,120.30 = 1,258.05/x
  3. Step 3: Cross multiply
    2,080.20x = 3,120.30 × 1,258.05
  4. Step 4: Simplify right side
    2,080.20x = 3,925,493.42
  5. Step 5: Solve for x
    x = 3,925,493.42/2,080.20
  6. Step 6: Final answer
    x = 1,887.08

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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.