Home / 2,212.38-3,318.54-913.86

Finding the Fourth Proportional to 2,212.38, 3,318.54 and 913.86

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Solution

The fourth proportional to 2,212.38, 3,318.54 and 913.86 is: 1,370.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,212.38 : 3,318.54 = 913.86 : x
  2. Step 2: Convert to fraction form
    2,212.38/3,318.54 = 913.86/x
  3. Step 3: Cross multiply
    2,212.38x = 3,318.54 × 913.86
  4. Step 4: Simplify right side
    2,212.38x = 3,032,680.96
  5. Step 5: Solve for x
    x = 3,032,680.96/2,212.38
  6. Step 6: Final answer
    x = 1,370.78

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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.