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Finding the Fourth Proportional to 321.15, 481.51 and 126.17

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Solution

The fourth proportional to 321.15, 481.51 and 126.17 is: 189.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.15 : 481.51 = 126.17 : x
  2. Step 2: Convert to fraction form
    321.15/481.51 = 126.17/x
  3. Step 3: Cross multiply
    321.15x = 481.51 × 126.17
  4. Step 4: Simplify right side
    321.15x = 60,754.38
  5. Step 5: Solve for x
    x = 60,754.38/321.15
  6. Step 6: Final answer
    x = 189.18

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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.