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Finding the Fourth Proportional to 247.78, 341.97 and 169.21

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Solution

The fourth proportional to 247.78, 341.97 and 169.21 is: 233.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.78 : 341.97 = 169.21 : x
  2. Step 2: Convert to fraction form
    247.78/341.97 = 169.21/x
  3. Step 3: Cross multiply
    247.78x = 341.97 × 169.21
  4. Step 4: Simplify right side
    247.78x = 57,864.74
  5. Step 5: Solve for x
    x = 57,864.74/247.78
  6. Step 6: Final answer
    x = 233.53

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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.