Home / 1,919.22-2,878.92-620.79

Finding the Fourth Proportional to 1,919.22, 2,878.92 and 620.79

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Solution

The fourth proportional to 1,919.22, 2,878.92 and 620.79 is: 931.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919.22 : 2,878.92 = 620.79 : x
  2. Step 2: Convert to fraction form
    1,919.22/2,878.92 = 620.79/x
  3. Step 3: Cross multiply
    1,919.22x = 2,878.92 × 620.79
  4. Step 4: Simplify right side
    1,919.22x = 1,787,204.75
  5. Step 5: Solve for x
    x = 1,787,204.75/1,919.22
  6. Step 6: Final answer
    x = 931.21

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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.