Home / 3,619.40-5,429.73-1,279.22

Finding the Fourth Proportional to 3,619.40, 5,429.73 and 1,279.22

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Solution

The fourth proportional to 3,619.40, 5,429.73 and 1,279.22 is: 1,919.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,619.40 : 5,429.73 = 1,279.22 : x
  2. Step 2: Convert to fraction form
    3,619.40/5,429.73 = 1,279.22/x
  3. Step 3: Cross multiply
    3,619.40x = 5,429.73 × 1,279.22
  4. Step 4: Simplify right side
    3,619.40x = 6,945,819.21
  5. Step 5: Solve for x
    x = 6,945,819.21/3,619.40
  6. Step 6: Final answer
    x = 1,919.05

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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.