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Finding the Fourth Proportional to 330.82, 456.54 and 199.86

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Solution

The fourth proportional to 330.82, 456.54 and 199.86 is: 275.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.82 : 456.54 = 199.86 : x
  2. Step 2: Convert to fraction form
    330.82/456.54 = 199.86/x
  3. Step 3: Cross multiply
    330.82x = 456.54 × 199.86
  4. Step 4: Simplify right side
    330.82x = 91,244.08
  5. Step 5: Solve for x
    x = 91,244.08/330.82
  6. Step 6: Final answer
    x = 275.81

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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.