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Finding the Fourth Proportional to 318, 476.68 and 163.99

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Solution

The fourth proportional to 318, 476.68 and 163.99 is: 245.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    318 : 476.68 = 163.99 : x
  2. Step 2: Convert to fraction form
    318/476.68 = 163.99/x
  3. Step 3: Cross multiply
    318x = 476.68 × 163.99
  4. Step 4: Simplify right side
    318x = 78,170.75
  5. Step 5: Solve for x
    x = 78,170.75/318
  6. Step 6: Final answer
    x = 245.82

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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.