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Finding the Fourth Proportional to 828.25, 1,242.60 and 273

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Solution

The fourth proportional to 828.25, 1,242.60 and 273 is: 409.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    828.25 : 1,242.60 = 273 : x
  2. Step 2: Convert to fraction form
    828.25/1,242.60 = 273/x
  3. Step 3: Cross multiply
    828.25x = 1,242.60 × 273
  4. Step 4: Simplify right side
    828.25x = 339,229.80
  5. Step 5: Solve for x
    x = 339,229.80/828.25
  6. Step 6: Final answer
    x = 409.57

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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.