Home / 3,478.74-5,218.92-1,138.86

Finding the Fourth Proportional to 3,478.74, 5,218.92 and 1,138.86

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Solution

The fourth proportional to 3,478.74, 5,218.92 and 1,138.86 is: 1,708.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,478.74 : 5,218.92 = 1,138.86 : x
  2. Step 2: Convert to fraction form
    3,478.74/5,218.92 = 1,138.86/x
  3. Step 3: Cross multiply
    3,478.74x = 5,218.92 × 1,138.86
  4. Step 4: Simplify right side
    3,478.74x = 5,943,619.23
  5. Step 5: Solve for x
    x = 5,943,619.23/3,478.74
  6. Step 6: Final answer
    x = 1,708.56

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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.