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Finding the Fourth Proportional to 331.07, 496.42 and 157.68

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Solution

The fourth proportional to 331.07, 496.42 and 157.68 is: 236.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.07 : 496.42 = 157.68 : x
  2. Step 2: Convert to fraction form
    331.07/496.42 = 157.68/x
  3. Step 3: Cross multiply
    331.07x = 496.42 × 157.68
  4. Step 4: Simplify right side
    331.07x = 78,275.11
  5. Step 5: Solve for x
    x = 78,275.11/331.07
  6. Step 6: Final answer
    x = 236.43

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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.