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Finding the Fourth Proportional to 442.52, 663.56 and 199.12

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Solution

The fourth proportional to 442.52, 663.56 and 199.12 is: 298.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.52 : 663.56 = 199.12 : x
  2. Step 2: Convert to fraction form
    442.52/663.56 = 199.12/x
  3. Step 3: Cross multiply
    442.52x = 663.56 × 199.12
  4. Step 4: Simplify right side
    442.52x = 132,128.07
  5. Step 5: Solve for x
    x = 132,128.07/442.52
  6. Step 6: Final answer
    x = 298.58

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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.