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Finding the Fourth Proportional to 442.59, 664.31 and 199.23

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Solution

The fourth proportional to 442.59, 664.31 and 199.23 is: 299.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.59 : 664.31 = 199.23 : x
  2. Step 2: Convert to fraction form
    442.59/664.31 = 199.23/x
  3. Step 3: Cross multiply
    442.59x = 664.31 × 199.23
  4. Step 4: Simplify right side
    442.59x = 132,349.49
  5. Step 5: Solve for x
    x = 132,349.49/442.59
  6. Step 6: Final answer
    x = 299.03

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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.