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Finding the Fourth Proportional to 330.95, 456.62 and 198.12

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Solution

The fourth proportional to 330.95, 456.62 and 198.12 is: 273.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.95 : 456.62 = 198.12 : x
  2. Step 2: Convert to fraction form
    330.95/456.62 = 198.12/x
  3. Step 3: Cross multiply
    330.95x = 456.62 × 198.12
  4. Step 4: Simplify right side
    330.95x = 90,463.84
  5. Step 5: Solve for x
    x = 90,463.84/330.95
  6. Step 6: Final answer
    x = 273.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.