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Finding the Fourth Proportional to 222.75, 333.27 and 209.79

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Solution

The fourth proportional to 222.75, 333.27 and 209.79 is: 313.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    222.75 : 333.27 = 209.79 : x
  2. Step 2: Convert to fraction form
    222.75/333.27 = 209.79/x
  3. Step 3: Cross multiply
    222.75x = 333.27 × 209.79
  4. Step 4: Simplify right side
    222.75x = 69,916.71
  5. Step 5: Solve for x
    x = 69,916.71/222.75
  6. Step 6: Final answer
    x = 313.88

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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.