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Finding the Fourth Proportional to 222.39, 334.26 and 218.88

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Solution

The fourth proportional to 222.39, 334.26 and 218.88 is: 328.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    222.39 : 334.26 = 218.88 : x
  2. Step 2: Convert to fraction form
    222.39/334.26 = 218.88/x
  3. Step 3: Cross multiply
    222.39x = 334.26 × 218.88
  4. Step 4: Simplify right side
    222.39x = 73,162.83
  5. Step 5: Solve for x
    x = 73,162.83/222.39
  6. Step 6: Final answer
    x = 328.98

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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.