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Finding the Fourth Proportional to 219.80, 329.09 and 185.58

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Solution

The fourth proportional to 219.80, 329.09 and 185.58 is: 277.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.80 : 329.09 = 185.58 : x
  2. Step 2: Convert to fraction form
    219.80/329.09 = 185.58/x
  3. Step 3: Cross multiply
    219.80x = 329.09 × 185.58
  4. Step 4: Simplify right side
    219.80x = 61,072.99
  5. Step 5: Solve for x
    x = 61,072.99/219.80
  6. Step 6: Final answer
    x = 277.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.