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Finding the Fourth Proportional to 222.67, 306.79 and 148.85

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Solution

The fourth proportional to 222.67, 306.79 and 148.85 is: 205.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    222.67 : 306.79 = 148.85 : x
  2. Step 2: Convert to fraction form
    222.67/306.79 = 148.85/x
  3. Step 3: Cross multiply
    222.67x = 306.79 × 148.85
  4. Step 4: Simplify right side
    222.67x = 45,666.66
  5. Step 5: Solve for x
    x = 45,666.66/222.67
  6. Step 6: Final answer
    x = 205.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.