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Finding the Fourth Proportional to 221.47, 305.54 and 134.11

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Solution

The fourth proportional to 221.47, 305.54 and 134.11 is: 185.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.47 : 305.54 = 134.11 : x
  2. Step 2: Convert to fraction form
    221.47/305.54 = 134.11/x
  3. Step 3: Cross multiply
    221.47x = 305.54 × 134.11
  4. Step 4: Simplify right side
    221.47x = 40,975.97
  5. Step 5: Solve for x
    x = 40,975.97/221.47
  6. Step 6: Final answer
    x = 185.02

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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.