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Finding the Fourth Proportional to 219.60, 327.78 and 205.92

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Solution

The fourth proportional to 219.60, 327.78 and 205.92 is: 307.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.60 : 327.78 = 205.92 : x
  2. Step 2: Convert to fraction form
    219.60/327.78 = 205.92/x
  3. Step 3: Cross multiply
    219.60x = 327.78 × 205.92
  4. Step 4: Simplify right side
    219.60x = 67,496.46
  5. Step 5: Solve for x
    x = 67,496.46/219.60
  6. Step 6: Final answer
    x = 307.36

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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.