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Finding the Fourth Proportional to 221.28, 304.73 and 190.19

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Solution

The fourth proportional to 221.28, 304.73 and 190.19 is: 261.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.28 : 304.73 = 190.19 : x
  2. Step 2: Convert to fraction form
    221.28/304.73 = 190.19/x
  3. Step 3: Cross multiply
    221.28x = 304.73 × 190.19
  4. Step 4: Simplify right side
    221.28x = 57,954.12
  5. Step 5: Solve for x
    x = 57,954.12/221.28
  6. Step 6: Final answer
    x = 261.90

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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.