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Finding the Fourth Proportional to 221.72, 306.23 and 175.59

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Solution

The fourth proportional to 221.72, 306.23 and 175.59 is: 242.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.72 : 306.23 = 175.59 : x
  2. Step 2: Convert to fraction form
    221.72/306.23 = 175.59/x
  3. Step 3: Cross multiply
    221.72x = 306.23 × 175.59
  4. Step 4: Simplify right side
    221.72x = 53,770.05
  5. Step 5: Solve for x
    x = 53,770.05/221.72
  6. Step 6: Final answer
    x = 242.52

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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.