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Finding the Fourth Proportional to 281.53, 386.45 and 249.75

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Solution

The fourth proportional to 281.53, 386.45 and 249.75 is: 342.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.53 : 386.45 = 249.75 : x
  2. Step 2: Convert to fraction form
    281.53/386.45 = 249.75/x
  3. Step 3: Cross multiply
    281.53x = 386.45 × 249.75
  4. Step 4: Simplify right side
    281.53x = 96,517.02
  5. Step 5: Solve for x
    x = 96,517.02/281.53
  6. Step 6: Final answer
    x = 342.83

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.