Home / 2,231.20-3,078.66-1,274.14

Finding the Fourth Proportional to 2,231.20, 3,078.66 and 1,274.14

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Solution

The fourth proportional to 2,231.20, 3,078.66 and 1,274.14 is: 1,758.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,231.20 : 3,078.66 = 1,274.14 : x
  2. Step 2: Convert to fraction form
    2,231.20/3,078.66 = 1,274.14/x
  3. Step 3: Cross multiply
    2,231.20x = 3,078.66 × 1,274.14
  4. Step 4: Simplify right side
    2,231.20x = 3,922,643.85
  5. Step 5: Solve for x
    x = 3,922,643.85/2,231.20
  6. Step 6: Final answer
    x = 1,758.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.