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Finding the Fourth Proportional to 219.18, 326.84 and 188.94

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Solution

The fourth proportional to 219.18, 326.84 and 188.94 is: 281.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.18 : 326.84 = 188.94 : x
  2. Step 2: Convert to fraction form
    219.18/326.84 = 188.94/x
  3. Step 3: Cross multiply
    219.18x = 326.84 × 188.94
  4. Step 4: Simplify right side
    219.18x = 61,753.15
  5. Step 5: Solve for x
    x = 61,753.15/219.18
  6. Step 6: Final answer
    x = 281.75

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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.