Home / 2,230.39-3,078.37-1,286.79

Finding the Fourth Proportional to 2,230.39, 3,078.37 and 1,286.79

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Solution

The fourth proportional to 2,230.39, 3,078.37 and 1,286.79 is: 1,776.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,230.39 : 3,078.37 = 1,286.79 : x
  2. Step 2: Convert to fraction form
    2,230.39/3,078.37 = 1,286.79/x
  3. Step 3: Cross multiply
    2,230.39x = 3,078.37 × 1,286.79
  4. Step 4: Simplify right side
    2,230.39x = 3,961,221.91
  5. Step 5: Solve for x
    x = 3,961,221.91/2,230.39
  6. Step 6: Final answer
    x = 1,776.02

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1.5x scale

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.