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Finding the Fourth Proportional to 247.87, 342.09 and 137.37

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Solution

The fourth proportional to 247.87, 342.09 and 137.37 is: 189.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.87 : 342.09 = 137.37 : x
  2. Step 2: Convert to fraction form
    247.87/342.09 = 137.37/x
  3. Step 3: Cross multiply
    247.87x = 342.09 × 137.37
  4. Step 4: Simplify right side
    247.87x = 46,994.19
  5. Step 5: Solve for x
    x = 46,994.19/247.87
  6. Step 6: Final answer
    x = 189.59

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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.