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Finding the Fourth Proportional to 257.73, 386.24 and 223.41

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Solution

The fourth proportional to 257.73, 386.24 and 223.41 is: 334.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    257.73 : 386.24 = 223.41 : x
  2. Step 2: Convert to fraction form
    257.73/386.24 = 223.41/x
  3. Step 3: Cross multiply
    257.73x = 386.24 × 223.41
  4. Step 4: Simplify right side
    257.73x = 86,286.83
  5. Step 5: Solve for x
    x = 86,286.83/257.73
  6. Step 6: Final answer
    x = 334.80

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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.