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Finding the Fourth Proportional to 219.51, 327.78 and 188.73

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Solution

The fourth proportional to 219.51, 327.78 and 188.73 is: 281.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.51 : 327.78 = 188.73 : x
  2. Step 2: Convert to fraction form
    219.51/327.78 = 188.73/x
  3. Step 3: Cross multiply
    219.51x = 327.78 × 188.73
  4. Step 4: Simplify right side
    219.51x = 61,861.92
  5. Step 5: Solve for x
    x = 61,861.92/219.51
  6. Step 6: Final answer
    x = 281.82

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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.