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Finding the Fourth Proportional to 279.56, 419.22 and 231.32

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Solution

The fourth proportional to 279.56, 419.22 and 231.32 is: 346.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.56 : 419.22 = 231.32 : x
  2. Step 2: Convert to fraction form
    279.56/419.22 = 231.32/x
  3. Step 3: Cross multiply
    279.56x = 419.22 × 231.32
  4. Step 4: Simplify right side
    279.56x = 96,973.97
  5. Step 5: Solve for x
    x = 96,973.97/279.56
  6. Step 6: Final answer
    x = 346.88

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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.