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Finding the Fourth Proportional to 326.46, 450.66 and 221.70

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Solution

The fourth proportional to 326.46, 450.66 and 221.70 is: 306.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.46 : 450.66 = 221.70 : x
  2. Step 2: Convert to fraction form
    326.46/450.66 = 221.70/x
  3. Step 3: Cross multiply
    326.46x = 450.66 × 221.70
  4. Step 4: Simplify right side
    326.46x = 99,911.32
  5. Step 5: Solve for x
    x = 99,911.32/326.46
  6. Step 6: Final answer
    x = 306.04

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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.