Home / 2,230.62-3,078.40-1,286.58

Finding the Fourth Proportional to 2,230.62, 3,078.40 and 1,286.58

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Solution

The fourth proportional to 2,230.62, 3,078.40 and 1,286.58 is: 1,775.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,230.62 : 3,078.40 = 1,286.58 : x
  2. Step 2: Convert to fraction form
    2,230.62/3,078.40 = 1,286.58/x
  3. Step 3: Cross multiply
    2,230.62x = 3,078.40 × 1,286.58
  4. Step 4: Simplify right side
    2,230.62x = 3,960,616.20
  5. Step 5: Solve for x
    x = 3,960,616.20/2,230.62
  6. Step 6: Final answer
    x = 1,775.57

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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.