Home / 2,212.91-3,320.44-1,391.57

Finding the Fourth Proportional to 2,212.91, 3,320.44 and 1,391.57

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Solution

The fourth proportional to 2,212.91, 3,320.44 and 1,391.57 is: 2,088.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,212.91 : 3,320.44 = 1,391.57 : x
  2. Step 2: Convert to fraction form
    2,212.91/3,320.44 = 1,391.57/x
  3. Step 3: Cross multiply
    2,212.91x = 3,320.44 × 1,391.57
  4. Step 4: Simplify right side
    2,212.91x = 4,620,624.69
  5. Step 5: Solve for x
    x = 4,620,624.69/2,212.91
  6. Step 6: Final answer
    x = 2,088.03

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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.