Home / 2,850.84-3,930.18-1,906.80

Finding the Fourth Proportional to 2,850.84, 3,930.18 and 1,906.80

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Solution

The fourth proportional to 2,850.84, 3,930.18 and 1,906.80 is: 2,628.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,850.84 : 3,930.18 = 1,906.80 : x
  2. Step 2: Convert to fraction form
    2,850.84/3,930.18 = 1,906.80/x
  3. Step 3: Cross multiply
    2,850.84x = 3,930.18 × 1,906.80
  4. Step 4: Simplify right side
    2,850.84x = 7,494,067.22
  5. Step 5: Solve for x
    x = 7,494,067.22/2,850.84
  6. Step 6: Final answer
    x = 2,628.72

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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.