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Finding the Fourth Proportional to 442.76, 664.50 and 226.40

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Solution

The fourth proportional to 442.76, 664.50 and 226.40 is: 339.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.76 : 664.50 = 226.40 : x
  2. Step 2: Convert to fraction form
    442.76/664.50 = 226.40/x
  3. Step 3: Cross multiply
    442.76x = 664.50 × 226.40
  4. Step 4: Simplify right side
    442.76x = 150,442.80
  5. Step 5: Solve for x
    x = 150,442.80/442.76
  6. Step 6: Final answer
    x = 339.78

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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.