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Finding the Fourth Proportional to 441.39, 609.38 and 308.55

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Solution

The fourth proportional to 441.39, 609.38 and 308.55 is: 425.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    441.39 : 609.38 = 308.55 : x
  2. Step 2: Convert to fraction form
    441.39/609.38 = 308.55/x
  3. Step 3: Cross multiply
    441.39x = 609.38 × 308.55
  4. Step 4: Simplify right side
    441.39x = 188,024.20
  5. Step 5: Solve for x
    x = 188,024.20/441.39
  6. Step 6: Final answer
    x = 425.98

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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.