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Finding the Fourth Proportional to 330.95, 456.72 and 198.18

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Solution

The fourth proportional to 330.95, 456.72 and 198.18 is: 273.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.95 : 456.72 = 198.18 : x
  2. Step 2: Convert to fraction form
    330.95/456.72 = 198.18/x
  3. Step 3: Cross multiply
    330.95x = 456.72 × 198.18
  4. Step 4: Simplify right side
    330.95x = 90,512.77
  5. Step 5: Solve for x
    x = 90,512.77/330.95
  6. Step 6: Final answer
    x = 273.49

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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.