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Finding the Fourth Proportional to 222.80, 331.96 and 208.83

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Solution

The fourth proportional to 222.80, 331.96 and 208.83 is: 311.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    222.80 : 331.96 = 208.83 : x
  2. Step 2: Convert to fraction form
    222.80/331.96 = 208.83/x
  3. Step 3: Cross multiply
    222.80x = 331.96 × 208.83
  4. Step 4: Simplify right side
    222.80x = 69,322.75
  5. Step 5: Solve for x
    x = 69,322.75/222.80
  6. Step 6: Final answer
    x = 311.14

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.