Home / 3,218.85-4,828.37-1,138.56

Finding the Fourth Proportional to 3,218.85, 4,828.37 and 1,138.56

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Solution

The fourth proportional to 3,218.85, 4,828.37 and 1,138.56 is: 1,707.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,218.85 : 4,828.37 = 1,138.56 : x
  2. Step 2: Convert to fraction form
    3,218.85/4,828.37 = 1,138.56/x
  3. Step 3: Cross multiply
    3,218.85x = 4,828.37 × 1,138.56
  4. Step 4: Simplify right side
    3,218.85x = 5,497,383.25
  5. Step 5: Solve for x
    x = 5,497,383.25/3,218.85
  6. Step 6: Final answer
    x = 1,707.87

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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.