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Finding the Fourth Proportional to 342.67, 472.90 and 195.31

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Solution

The fourth proportional to 342.67, 472.90 and 195.31 is: 269.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.67 : 472.90 = 195.31 : x
  2. Step 2: Convert to fraction form
    342.67/472.90 = 195.31/x
  3. Step 3: Cross multiply
    342.67x = 472.90 × 195.31
  4. Step 4: Simplify right side
    342.67x = 92,362.84
  5. Step 5: Solve for x
    x = 92,362.84/342.67
  6. Step 6: Final answer
    x = 269.54

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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.