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Finding the Fourth Proportional to 247.96, 342.20 and 149.66

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Solution

The fourth proportional to 247.96, 342.20 and 149.66 is: 206.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.96 : 342.20 = 149.66 : x
  2. Step 2: Convert to fraction form
    247.96/342.20 = 149.66/x
  3. Step 3: Cross multiply
    247.96x = 342.20 × 149.66
  4. Step 4: Simplify right side
    247.96x = 51,213.66
  5. Step 5: Solve for x
    x = 51,213.66/247.96
  6. Step 6: Final answer
    x = 206.54

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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.