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Finding the Fourth Proportional to 247.80, 341.95 and 137.27

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Solution

The fourth proportional to 247.80, 341.95 and 137.27 is: 189.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.80 : 341.95 = 137.27 : x
  2. Step 2: Convert to fraction form
    247.80/341.95 = 137.27/x
  3. Step 3: Cross multiply
    247.80x = 341.95 × 137.27
  4. Step 4: Simplify right side
    247.80x = 46,938.32
  5. Step 5: Solve for x
    x = 46,938.32/247.80
  6. Step 6: Final answer
    x = 189.42

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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.