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Finding the Fourth Proportional to 443.43, 664.34 and 306.09

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Solution

The fourth proportional to 443.43, 664.34 and 306.09 is: 458.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.43 : 664.34 = 306.09 : x
  2. Step 2: Convert to fraction form
    443.43/664.34 = 306.09/x
  3. Step 3: Cross multiply
    443.43x = 664.34 × 306.09
  4. Step 4: Simplify right side
    443.43x = 203,346.30
  5. Step 5: Solve for x
    x = 203,346.30/443.43
  6. Step 6: Final answer
    x = 458.58

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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.