Home / 2,230.66-3,078.62-1,286.61

Finding the Fourth Proportional to 2,230.66, 3,078.62 and 1,286.61

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Solution

The fourth proportional to 2,230.66, 3,078.62 and 1,286.61 is: 1,775.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,230.66 : 3,078.62 = 1,286.61 : x
  2. Step 2: Convert to fraction form
    2,230.66/3,078.62 = 1,286.61/x
  3. Step 3: Cross multiply
    2,230.66x = 3,078.62 × 1,286.61
  4. Step 4: Simplify right side
    2,230.66x = 3,960,983.28
  5. Step 5: Solve for x
    x = 3,960,983.28/2,230.66
  6. Step 6: Final answer
    x = 1,775.70

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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.