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Finding the Fourth Proportional to 221.45, 305.51 and 133.97

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Solution

The fourth proportional to 221.45, 305.51 and 133.97 is: 184.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.45 : 305.51 = 133.97 : x
  2. Step 2: Convert to fraction form
    221.45/305.51 = 133.97/x
  3. Step 3: Cross multiply
    221.45x = 305.51 × 133.97
  4. Step 4: Simplify right side
    221.45x = 40,926.98
  5. Step 5: Solve for x
    x = 40,926.98/221.45
  6. Step 6: Final answer
    x = 184.82

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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.