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Finding the Fourth Proportional to 247.38, 341.40 and 149.15

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Solution

The fourth proportional to 247.38, 341.40 and 149.15 is: 205.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.38 : 341.40 = 149.15 : x
  2. Step 2: Convert to fraction form
    247.38/341.40 = 149.15/x
  3. Step 3: Cross multiply
    247.38x = 341.40 × 149.15
  4. Step 4: Simplify right side
    247.38x = 50,921.86
  5. Step 5: Solve for x
    x = 50,921.86/247.38
  6. Step 6: Final answer
    x = 205.84

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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.