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Finding the Fourth Proportional to 247.78, 371.26 and 125.88

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Solution

The fourth proportional to 247.78, 371.26 and 125.88 is: 188.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.78 : 371.26 = 125.88 : x
  2. Step 2: Convert to fraction form
    247.78/371.26 = 125.88/x
  3. Step 3: Cross multiply
    247.78x = 371.26 × 125.88
  4. Step 4: Simplify right side
    247.78x = 46,734.21
  5. Step 5: Solve for x
    x = 46,734.21/247.78
  6. Step 6: Final answer
    x = 188.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.