Home / 2,789.24-4,179.20-1,965.78

Finding the Fourth Proportional to 2,789.24, 4,179.20 and 1,965.78

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Solution

The fourth proportional to 2,789.24, 4,179.20 and 1,965.78 is: 2,945.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,789.24 : 4,179.20 = 1,965.78 : x
  2. Step 2: Convert to fraction form
    2,789.24/4,179.20 = 1,965.78/x
  3. Step 3: Cross multiply
    2,789.24x = 4,179.20 × 1,965.78
  4. Step 4: Simplify right side
    2,789.24x = 8,215,377.95
  5. Step 5: Solve for x
    x = 8,215,377.95/2,789.24
  6. Step 6: Final answer
    x = 2,945.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.