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Finding the Fourth Proportional to 247.72, 341.88 and 137.22

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Solution

The fourth proportional to 247.72, 341.88 and 137.22 is: 189.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.72 : 341.88 = 137.22 : x
  2. Step 2: Convert to fraction form
    247.72/341.88 = 137.22/x
  3. Step 3: Cross multiply
    247.72x = 341.88 × 137.22
  4. Step 4: Simplify right side
    247.72x = 46,912.77
  5. Step 5: Solve for x
    x = 46,912.77/247.72
  6. Step 6: Final answer
    x = 189.38

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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.