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Finding the Fourth Proportional to 318.14, 476.85 and 163.61

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Solution

The fourth proportional to 318.14, 476.85 and 163.61 is: 245.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.14 : 476.85 = 163.61 : x
  2. Step 2: Convert to fraction form
    318.14/476.85 = 163.61/x
  3. Step 3: Cross multiply
    318.14x = 476.85 × 163.61
  4. Step 4: Simplify right side
    318.14x = 78,017.43
  5. Step 5: Solve for x
    x = 78,017.43/318.14
  6. Step 6: Final answer
    x = 245.23

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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.