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Finding the Fourth Proportional to 828.20, 1,241.21 and 341.61

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Solution

The fourth proportional to 828.20, 1,241.21 and 341.61 is: 511.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    828.20 : 1,241.21 = 341.61 : x
  2. Step 2: Convert to fraction form
    828.20/1,241.21 = 341.61/x
  3. Step 3: Cross multiply
    828.20x = 1,241.21 × 341.61
  4. Step 4: Simplify right side
    828.20x = 424,010.60
  5. Step 5: Solve for x
    x = 424,010.60/828.20
  6. Step 6: Final answer
    x = 511.97

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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.