Home / 3,110.28-4,665.81-919.05

Finding the Fourth Proportional to 3,110.28, 4,665.81 and 919.05

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Solution

The fourth proportional to 3,110.28, 4,665.81 and 919.05 is: 1,378.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,110.28 : 4,665.81 = 919.05 : x
  2. Step 2: Convert to fraction form
    3,110.28/4,665.81 = 919.05/x
  3. Step 3: Cross multiply
    3,110.28x = 4,665.81 × 919.05
  4. Step 4: Simplify right side
    3,110.28x = 4,288,112.68
  5. Step 5: Solve for x
    x = 4,288,112.68/3,110.28
  6. Step 6: Final answer
    x = 1,378.69

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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.