Home / 1,919.44-2,879.04-620.80

Finding the Fourth Proportional to 1,919.44, 2,879.04 and 620.80

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Solution

The fourth proportional to 1,919.44, 2,879.04 and 620.80 is: 931.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919.44 : 2,879.04 = 620.80 : x
  2. Step 2: Convert to fraction form
    1,919.44/2,879.04 = 620.80/x
  3. Step 3: Cross multiply
    1,919.44x = 2,879.04 × 620.80
  4. Step 4: Simplify right side
    1,919.44x = 1,787,308.03
  5. Step 5: Solve for x
    x = 1,787,308.03/1,919.44
  6. Step 6: Final answer
    x = 931.16

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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.