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Finding the Fourth Proportional to 263.96, 393.63 and 231.61

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Solution

The fourth proportional to 263.96, 393.63 and 231.61 is: 345.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    263.96 : 393.63 = 231.61 : x
  2. Step 2: Convert to fraction form
    263.96/393.63 = 231.61/x
  3. Step 3: Cross multiply
    263.96x = 393.63 × 231.61
  4. Step 4: Simplify right side
    263.96x = 91,167.66
  5. Step 5: Solve for x
    x = 91,167.66/263.96
  6. Step 6: Final answer
    x = 345.39

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.