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Finding the Fourth Proportional to 282.36, 422.94 and 279.12

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Solution

The fourth proportional to 282.36, 422.94 and 279.12 is: 418.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.36 : 422.94 = 279.12 : x
  2. Step 2: Convert to fraction form
    282.36/422.94 = 279.12/x
  3. Step 3: Cross multiply
    282.36x = 422.94 × 279.12
  4. Step 4: Simplify right side
    282.36x = 118,051.01
  5. Step 5: Solve for x
    x = 118,051.01/282.36
  6. Step 6: Final answer
    x = 418.09

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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.