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Finding the Fourth Proportional to 221.16, 304.80 and 171.84

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Solution

The fourth proportional to 221.16, 304.80 and 171.84 is: 236.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.16 : 304.80 = 171.84 : x
  2. Step 2: Convert to fraction form
    221.16/304.80 = 171.84/x
  3. Step 3: Cross multiply
    221.16x = 304.80 × 171.84
  4. Step 4: Simplify right side
    221.16x = 52,376.83
  5. Step 5: Solve for x
    x = 52,376.83/221.16
  6. Step 6: Final answer
    x = 236.83

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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.