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Finding the Fourth Proportional to 231.21, 319.07 and 132.96

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Solution

The fourth proportional to 231.21, 319.07 and 132.96 is: 183.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.21 : 319.07 = 132.96 : x
  2. Step 2: Convert to fraction form
    231.21/319.07 = 132.96/x
  3. Step 3: Cross multiply
    231.21x = 319.07 × 132.96
  4. Step 4: Simplify right side
    231.21x = 42,424.48
  5. Step 5: Solve for x
    x = 42,424.48/231.21
  6. Step 6: Final answer
    x = 183.49

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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.