Home / 1,919.41-2,878.91-1,188.79

Finding the Fourth Proportional to 1,919.41, 2,878.91 and 1,188.79

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Solution

The fourth proportional to 1,919.41, 2,878.91 and 1,188.79 is: 1,783.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919.41 : 2,878.91 = 1,188.79 : x
  2. Step 2: Convert to fraction form
    1,919.41/2,878.91 = 1,188.79/x
  3. Step 3: Cross multiply
    1,919.41x = 2,878.91 × 1,188.79
  4. Step 4: Simplify right side
    1,919.41x = 3,422,399.08
  5. Step 5: Solve for x
    x = 3,422,399.08/1,919.41
  6. Step 6: Final answer
    x = 1,783.05

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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.