Home / 2,230.40-3,078.04-1,286.44

Finding the Fourth Proportional to 2,230.40, 3,078.04 and 1,286.44

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Solution

The fourth proportional to 2,230.40, 3,078.04 and 1,286.44 is: 1,775.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,230.40 : 3,078.04 = 1,286.44 : x
  2. Step 2: Convert to fraction form
    2,230.40/3,078.04 = 1,286.44/x
  3. Step 3: Cross multiply
    2,230.40x = 3,078.04 × 1,286.44
  4. Step 4: Simplify right side
    2,230.40x = 3,959,713.78
  5. Step 5: Solve for x
    x = 3,959,713.78/2,230.40
  6. Step 6: Final answer
    x = 1,775.34

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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.