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Finding the Fourth Proportional to 441.42, 609.65 and 308.99

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Solution

The fourth proportional to 441.42, 609.65 and 308.99 is: 426.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    441.42 : 609.65 = 308.99 : x
  2. Step 2: Convert to fraction form
    441.42/609.65 = 308.99/x
  3. Step 3: Cross multiply
    441.42x = 609.65 × 308.99
  4. Step 4: Simplify right side
    441.42x = 188,375.75
  5. Step 5: Solve for x
    x = 188,375.75/441.42
  6. Step 6: Final answer
    x = 426.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.