Home / 3,618.97-5,429.49-1,279.56

Finding the Fourth Proportional to 3,618.97, 5,429.49 and 1,279.56

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Solution

The fourth proportional to 3,618.97, 5,429.49 and 1,279.56 is: 1,919.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,618.97 : 5,429.49 = 1,279.56 : x
  2. Step 2: Convert to fraction form
    3,618.97/5,429.49 = 1,279.56/x
  3. Step 3: Cross multiply
    3,618.97x = 5,429.49 × 1,279.56
  4. Step 4: Simplify right side
    3,618.97x = 6,947,358.22
  5. Step 5: Solve for x
    x = 6,947,358.22/3,618.97
  6. Step 6: Final answer
    x = 1,919.71

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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.