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Finding the Fourth Proportional to 331.16, 496.44 and 157.72

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Solution

The fourth proportional to 331.16, 496.44 and 157.72 is: 236.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.16 : 496.44 = 157.72 : x
  2. Step 2: Convert to fraction form
    331.16/496.44 = 157.72/x
  3. Step 3: Cross multiply
    331.16x = 496.44 × 157.72
  4. Step 4: Simplify right side
    331.16x = 78,298.52
  5. Step 5: Solve for x
    x = 78,298.52/331.16
  6. Step 6: Final answer
    x = 236.44

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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.