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Finding the Fourth Proportional to 247.96, 342.18 and 137.44

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Solution

The fourth proportional to 247.96, 342.18 and 137.44 is: 189.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.96 : 342.18 = 137.44 : x
  2. Step 2: Convert to fraction form
    247.96/342.18 = 137.44/x
  3. Step 3: Cross multiply
    247.96x = 342.18 × 137.44
  4. Step 4: Simplify right side
    247.96x = 47,029.22
  5. Step 5: Solve for x
    x = 47,029.22/247.96
  6. Step 6: Final answer
    x = 189.66

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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.