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Finding the Fourth Proportional to 318.09, 475.35 and 300.54

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Solution

The fourth proportional to 318.09, 475.35 and 300.54 is: 449.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.09 : 475.35 = 300.54 : x
  2. Step 2: Convert to fraction form
    318.09/475.35 = 300.54/x
  3. Step 3: Cross multiply
    318.09x = 475.35 × 300.54
  4. Step 4: Simplify right side
    318.09x = 142,861.69
  5. Step 5: Solve for x
    x = 142,861.69/318.09
  6. Step 6: Final answer
    x = 449.12

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.