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Finding the Fourth Proportional to 326.88, 451.02 and 221.98

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Solution

The fourth proportional to 326.88, 451.02 and 221.98 is: 306.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.88 : 451.02 = 221.98 : x
  2. Step 2: Convert to fraction form
    326.88/451.02 = 221.98/x
  3. Step 3: Cross multiply
    326.88x = 451.02 × 221.98
  4. Step 4: Simplify right side
    326.88x = 100,117.42
  5. Step 5: Solve for x
    x = 100,117.42/326.88
  6. Step 6: Final answer
    x = 306.28

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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.