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Finding the Fourth Proportional to 282.11, 422.48 and 199.64

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Solution

The fourth proportional to 282.11, 422.48 and 199.64 is: 298.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.11 : 422.48 = 199.64 : x
  2. Step 2: Convert to fraction form
    282.11/422.48 = 199.64/x
  3. Step 3: Cross multiply
    282.11x = 422.48 × 199.64
  4. Step 4: Simplify right side
    282.11x = 84,343.43
  5. Step 5: Solve for x
    x = 84,343.43/282.11
  6. Step 6: Final answer
    x = 298.98

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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.