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Finding the Fourth Proportional to 221.27, 330.32 and 192.60

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Solution

The fourth proportional to 221.27, 330.32 and 192.60 is: 287.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.27 : 330.32 = 192.60 : x
  2. Step 2: Convert to fraction form
    221.27/330.32 = 192.60/x
  3. Step 3: Cross multiply
    221.27x = 330.32 × 192.60
  4. Step 4: Simplify right side
    221.27x = 63,618.67
  5. Step 5: Solve for x
    x = 63,618.67/221.27
  6. Step 6: Final answer
    x = 287.52

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.