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Finding the Fourth Proportional to 342.63, 513.79 and 137.12

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Solution

The fourth proportional to 342.63, 513.79 and 137.12 is: 205.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.63 : 513.79 = 137.12 : x
  2. Step 2: Convert to fraction form
    342.63/513.79 = 137.12/x
  3. Step 3: Cross multiply
    342.63x = 513.79 × 137.12
  4. Step 4: Simplify right side
    342.63x = 70,447.97
  5. Step 5: Solve for x
    x = 70,447.97/342.63
  6. Step 6: Final answer
    x = 205.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.