Home / 2,212.74-3,318.98-979.79

Finding the Fourth Proportional to 2,212.74, 3,318.98 and 979.79

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Solution

The fourth proportional to 2,212.74, 3,318.98 and 979.79 is: 1,469.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,212.74 : 3,318.98 = 979.79 : x
  2. Step 2: Convert to fraction form
    2,212.74/3,318.98 = 979.79/x
  3. Step 3: Cross multiply
    2,212.74x = 3,318.98 × 979.79
  4. Step 4: Simplify right side
    2,212.74x = 3,251,881.92
  5. Step 5: Solve for x
    x = 3,251,881.92/2,212.74
  6. Step 6: Final answer
    x = 1,469.62

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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.