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Finding the Fourth Proportional to 217.92, 328.49 and 195.60

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Solution

The fourth proportional to 217.92, 328.49 and 195.60 is: 294.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.92 : 328.49 = 195.60 : x
  2. Step 2: Convert to fraction form
    217.92/328.49 = 195.60/x
  3. Step 3: Cross multiply
    217.92x = 328.49 × 195.60
  4. Step 4: Simplify right side
    217.92x = 64,251.67
  5. Step 5: Solve for x
    x = 64,251.67/217.92
  6. Step 6: Final answer
    x = 294.84

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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.