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Finding the Fourth Proportional to 318.62, 477.97 and 126.22

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Solution

The fourth proportional to 318.62, 477.97 and 126.22 is: 189.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.62 : 477.97 = 126.22 : x
  2. Step 2: Convert to fraction form
    318.62/477.97 = 126.22/x
  3. Step 3: Cross multiply
    318.62x = 477.97 × 126.22
  4. Step 4: Simplify right side
    318.62x = 60,329.37
  5. Step 5: Solve for x
    x = 60,329.37/318.62
  6. Step 6: Final answer
    x = 189.35

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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.