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Finding the Fourth Proportional to 827.63, 1,241.32 and 272.35

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Solution

The fourth proportional to 827.63, 1,241.32 and 272.35 is: 408.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    827.63 : 1,241.32 = 272.35 : x
  2. Step 2: Convert to fraction form
    827.63/1,241.32 = 272.35/x
  3. Step 3: Cross multiply
    827.63x = 1,241.32 × 272.35
  4. Step 4: Simplify right side
    827.63x = 338,067.90
  5. Step 5: Solve for x
    x = 338,067.90/827.63
  6. Step 6: Final answer
    x = 408.47

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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.