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Finding the Fourth Proportional to 445.27, 667.99 and 137.15

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Solution

The fourth proportional to 445.27, 667.99 and 137.15 is: 205.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.27 : 667.99 = 137.15 : x
  2. Step 2: Convert to fraction form
    445.27/667.99 = 137.15/x
  3. Step 3: Cross multiply
    445.27x = 667.99 × 137.15
  4. Step 4: Simplify right side
    445.27x = 91,613.65
  5. Step 5: Solve for x
    x = 91,613.65/445.27
  6. Step 6: Final answer
    x = 205.75

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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.