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Finding the Fourth Proportional to 247.35, 341.34 and 154.09

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Solution

The fourth proportional to 247.35, 341.34 and 154.09 is: 212.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.35 : 341.34 = 154.09 : x
  2. Step 2: Convert to fraction form
    247.35/341.34 = 154.09/x
  3. Step 3: Cross multiply
    247.35x = 341.34 × 154.09
  4. Step 4: Simplify right side
    247.35x = 52,597.08
  5. Step 5: Solve for x
    x = 52,597.08/247.35
  6. Step 6: Final answer
    x = 212.64

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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.