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Finding the Fourth Proportional to 222.91, 331.53 and 218.30

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Solution

The fourth proportional to 222.91, 331.53 and 218.30 is: 324.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    222.91 : 331.53 = 218.30 : x
  2. Step 2: Convert to fraction form
    222.91/331.53 = 218.30/x
  3. Step 3: Cross multiply
    222.91x = 331.53 × 218.30
  4. Step 4: Simplify right side
    222.91x = 72,373.00
  5. Step 5: Solve for x
    x = 72,373.00/222.91
  6. Step 6: Final answer
    x = 324.67

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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.