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Finding the Fourth Proportional to 442.38, 610.38 and 309.44

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Solution

The fourth proportional to 442.38, 610.38 and 309.44 is: 426.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.38 : 610.38 = 309.44 : x
  2. Step 2: Convert to fraction form
    442.38/610.38 = 309.44/x
  3. Step 3: Cross multiply
    442.38x = 610.38 × 309.44
  4. Step 4: Simplify right side
    442.38x = 188,872.94
  5. Step 5: Solve for x
    x = 188,872.94/442.38
  6. Step 6: Final answer
    x = 426.95

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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.