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Finding the Fourth Proportional to 247.92, 342.21 and 148.37

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Solution

The fourth proportional to 247.92, 342.21 and 148.37 is: 204.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.92 : 342.21 = 148.37 : x
  2. Step 2: Convert to fraction form
    247.92/342.21 = 148.37/x
  3. Step 3: Cross multiply
    247.92x = 342.21 × 148.37
  4. Step 4: Simplify right side
    247.92x = 50,771.99
  5. Step 5: Solve for x
    x = 50,771.99/247.92
  6. Step 6: Final answer
    x = 204.79

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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.