Home / 2,230.62-3,078.08-1,286.70

Finding the Fourth Proportional to 2,230.62, 3,078.08 and 1,286.70

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Solution

The fourth proportional to 2,230.62, 3,078.08 and 1,286.70 is: 1,775.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,230.62 : 3,078.08 = 1,286.70 : x
  2. Step 2: Convert to fraction form
    2,230.62/3,078.08 = 1,286.70/x
  3. Step 3: Cross multiply
    2,230.62x = 3,078.08 × 1,286.70
  4. Step 4: Simplify right side
    2,230.62x = 3,960,565.54
  5. Step 5: Solve for x
    x = 3,960,565.54/2,230.62
  6. Step 6: Final answer
    x = 1,775.54

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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.