Home / 3,478.56-5,218.49-1,138.38

Finding the Fourth Proportional to 3,478.56, 5,218.49 and 1,138.38

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Solution

The fourth proportional to 3,478.56, 5,218.49 and 1,138.38 is: 1,707.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,478.56 : 5,218.49 = 1,138.38 : x
  2. Step 2: Convert to fraction form
    3,478.56/5,218.49 = 1,138.38/x
  3. Step 3: Cross multiply
    3,478.56x = 5,218.49 × 1,138.38
  4. Step 4: Simplify right side
    3,478.56x = 5,940,624.65
  5. Step 5: Solve for x
    x = 5,940,624.65/3,478.56
  6. Step 6: Final answer
    x = 1,707.78

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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.