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Finding the Fourth Proportional to 247.78, 341.92 and 154.56

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Solution

The fourth proportional to 247.78, 341.92 and 154.56 is: 213.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.78 : 341.92 = 154.56 : x
  2. Step 2: Convert to fraction form
    247.78/341.92 = 154.56/x
  3. Step 3: Cross multiply
    247.78x = 341.92 × 154.56
  4. Step 4: Simplify right side
    247.78x = 52,846.71
  5. Step 5: Solve for x
    x = 52,846.71/247.78
  6. Step 6: Final answer
    x = 213.28

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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.