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Finding the Fourth Proportional to 219.96, 329.06 and 191.40

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Solution

The fourth proportional to 219.96, 329.06 and 191.40 is: 286.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.96 : 329.06 = 191.40 : x
  2. Step 2: Convert to fraction form
    219.96/329.06 = 191.40/x
  3. Step 3: Cross multiply
    219.96x = 329.06 × 191.40
  4. Step 4: Simplify right side
    219.96x = 62,982.08
  5. Step 5: Solve for x
    x = 62,982.08/219.96
  6. Step 6: Final answer
    x = 286.33

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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.