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Finding the Fourth Proportional to 221.12, 304.80 and 199.04

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Solution

The fourth proportional to 221.12, 304.80 and 199.04 is: 274.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.12 : 304.80 = 199.04 : x
  2. Step 2: Convert to fraction form
    221.12/304.80 = 199.04/x
  3. Step 3: Cross multiply
    221.12x = 304.80 × 199.04
  4. Step 4: Simplify right side
    221.12x = 60,667.39
  5. Step 5: Solve for x
    x = 60,667.39/221.12
  6. Step 6: Final answer
    x = 274.36

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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.