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Finding the Fourth Proportional to 312.33, 431.10 and 195.96

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Solution

The fourth proportional to 312.33, 431.10 and 195.96 is: 270.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.33 : 431.10 = 195.96 : x
  2. Step 2: Convert to fraction form
    312.33/431.10 = 195.96/x
  3. Step 3: Cross multiply
    312.33x = 431.10 × 195.96
  4. Step 4: Simplify right side
    312.33x = 84,478.36
  5. Step 5: Solve for x
    x = 84,478.36/312.33
  6. Step 6: Final answer
    x = 270.48

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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.