Home / 3,110.70-4,665.68-919.38

Finding the Fourth Proportional to 3,110.70, 4,665.68 and 919.38

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Solution

The fourth proportional to 3,110.70, 4,665.68 and 919.38 is: 1,378.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,110.70 : 4,665.68 = 919.38 : x
  2. Step 2: Convert to fraction form
    3,110.70/4,665.68 = 919.38/x
  3. Step 3: Cross multiply
    3,110.70x = 4,665.68 × 919.38
  4. Step 4: Simplify right side
    3,110.70x = 4,289,532.88
  5. Step 5: Solve for x
    x = 4,289,532.88/3,110.70
  6. Step 6: Final answer
    x = 1,378.96

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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.