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Finding the Fourth Proportional to 221.81, 334.35 and 181.71

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Solution

The fourth proportional to 221.81, 334.35 and 181.71 is: 273.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.81 : 334.35 = 181.71 : x
  2. Step 2: Convert to fraction form
    221.81/334.35 = 181.71/x
  3. Step 3: Cross multiply
    221.81x = 334.35 × 181.71
  4. Step 4: Simplify right side
    221.81x = 60,754.74
  5. Step 5: Solve for x
    x = 60,754.74/221.81
  6. Step 6: Final answer
    x = 273.91

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.