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Finding the Fourth Proportional to 219.27, 330.45 and 205.60

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Solution

The fourth proportional to 219.27, 330.45 and 205.60 is: 309.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.27 : 330.45 = 205.60 : x
  2. Step 2: Convert to fraction form
    219.27/330.45 = 205.60/x
  3. Step 3: Cross multiply
    219.27x = 330.45 × 205.60
  4. Step 4: Simplify right side
    219.27x = 67,940.52
  5. Step 5: Solve for x
    x = 67,940.52/219.27
  6. Step 6: Final answer
    x = 309.85

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.