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Finding the Fourth Proportional to 231.65, 320.02 and 196.62

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Solution

The fourth proportional to 231.65, 320.02 and 196.62 is: 271.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.65 : 320.02 = 196.62 : x
  2. Step 2: Convert to fraction form
    231.65/320.02 = 196.62/x
  3. Step 3: Cross multiply
    231.65x = 320.02 × 196.62
  4. Step 4: Simplify right side
    231.65x = 62,922.33
  5. Step 5: Solve for x
    x = 62,922.33/231.65
  6. Step 6: Final answer
    x = 271.63

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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.