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Finding the Fourth Proportional to 231.12, 344.90 and 206.48

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Solution

The fourth proportional to 231.12, 344.90 and 206.48 is: 308.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.12 : 344.90 = 206.48 : x
  2. Step 2: Convert to fraction form
    231.12/344.90 = 206.48/x
  3. Step 3: Cross multiply
    231.12x = 344.90 × 206.48
  4. Step 4: Simplify right side
    231.12x = 71,212.20
  5. Step 5: Solve for x
    x = 71,212.20/231.12
  6. Step 6: Final answer
    x = 308.12

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.