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Finding the Fourth Proportional to 247.89, 342.09 and 149.66

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Solution

The fourth proportional to 247.89, 342.09 and 149.66 is: 206.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.89 : 342.09 = 149.66 : x
  2. Step 2: Convert to fraction form
    247.89/342.09 = 149.66/x
  3. Step 3: Cross multiply
    247.89x = 342.09 × 149.66
  4. Step 4: Simplify right side
    247.89x = 51,195.48
  5. Step 5: Solve for x
    x = 51,195.48/247.89
  6. Step 6: Final answer
    x = 206.52

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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.