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Finding the Fourth Proportional to 247.09, 340.87 and 148.85

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Solution

The fourth proportional to 247.09, 340.87 and 148.85 is: 205.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.09 : 340.87 = 148.85 : x
  2. Step 2: Convert to fraction form
    247.09/340.87 = 148.85/x
  3. Step 3: Cross multiply
    247.09x = 340.87 × 148.85
  4. Step 4: Simplify right side
    247.09x = 50,738.50
  5. Step 5: Solve for x
    x = 50,738.50/247.09
  6. Step 6: Final answer
    x = 205.34

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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.