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Finding the Fourth Proportional to 279.82, 385.59 and 231.04

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Solution

The fourth proportional to 279.82, 385.59 and 231.04 is: 318.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.82 : 385.59 = 231.04 : x
  2. Step 2: Convert to fraction form
    279.82/385.59 = 231.04/x
  3. Step 3: Cross multiply
    279.82x = 385.59 × 231.04
  4. Step 4: Simplify right side
    279.82x = 89,086.71
  5. Step 5: Solve for x
    x = 89,086.71/279.82
  6. Step 6: Final answer
    x = 318.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.