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Finding the Fourth Proportional to 243.08, 364.80 and 219.80

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Solution

The fourth proportional to 243.08, 364.80 and 219.80 is: 329.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.08 : 364.80 = 219.80 : x
  2. Step 2: Convert to fraction form
    243.08/364.80 = 219.80/x
  3. Step 3: Cross multiply
    243.08x = 364.80 × 219.80
  4. Step 4: Simplify right side
    243.08x = 80,183.04
  5. Step 5: Solve for x
    x = 80,183.04/243.08
  6. Step 6: Final answer
    x = 329.86

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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.