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Finding the Fourth Proportional to 219.57, 330.68 and 198.18

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Solution

The fourth proportional to 219.57, 330.68 and 198.18 is: 298.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.57 : 330.68 = 198.18 : x
  2. Step 2: Convert to fraction form
    219.57/330.68 = 198.18/x
  3. Step 3: Cross multiply
    219.57x = 330.68 × 198.18
  4. Step 4: Simplify right side
    219.57x = 65,533.17
  5. Step 5: Solve for x
    x = 65,533.17/219.57
  6. Step 6: Final answer
    x = 298.46

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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.