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Finding the Fourth Proportional to 247.96, 342.17 and 137.45

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Solution

The fourth proportional to 247.96, 342.17 and 137.45 is: 189.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.96 : 342.17 = 137.45 : x
  2. Step 2: Convert to fraction form
    247.96/342.17 = 137.45/x
  3. Step 3: Cross multiply
    247.96x = 342.17 × 137.45
  4. Step 4: Simplify right side
    247.96x = 47,029.90
  5. Step 5: Solve for x
    x = 47,029.90/247.96
  6. Step 6: Final answer
    x = 189.67

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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.