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Finding the Fourth Proportional to 331.69, 497.45 and 112.31

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Solution

The fourth proportional to 331.69, 497.45 and 112.31 is: 168.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.69 : 497.45 = 112.31 : x
  2. Step 2: Convert to fraction form
    331.69/497.45 = 112.31/x
  3. Step 3: Cross multiply
    331.69x = 497.45 × 112.31
  4. Step 4: Simplify right side
    331.69x = 55,867.37
  5. Step 5: Solve for x
    x = 55,867.37/331.69
  6. Step 6: Final answer
    x = 168.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.