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Finding the Fourth Proportional to 496.63, 685.11 and 330.86

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Solution

The fourth proportional to 496.63, 685.11 and 330.86 is: 456.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    496.63 : 685.11 = 330.86 : x
  2. Step 2: Convert to fraction form
    496.63/685.11 = 330.86/x
  3. Step 3: Cross multiply
    496.63x = 685.11 × 330.86
  4. Step 4: Simplify right side
    496.63x = 226,674.66
  5. Step 5: Solve for x
    x = 226,674.66/496.63
  6. Step 6: Final answer
    x = 456.42

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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.