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Finding the Fourth Proportional to 221.07, 330.92 and 152.19

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Solution

The fourth proportional to 221.07, 330.92 and 152.19 is: 227.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.07 : 330.92 = 152.19 : x
  2. Step 2: Convert to fraction form
    221.07/330.92 = 152.19/x
  3. Step 3: Cross multiply
    221.07x = 330.92 × 152.19
  4. Step 4: Simplify right side
    221.07x = 50,361.95
  5. Step 5: Solve for x
    x = 50,361.95/221.07
  6. Step 6: Final answer
    x = 227.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.