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Finding the Fourth Proportional to 828.94, 1,244.49 and 439.24

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Solution

The fourth proportional to 828.94, 1,244.49 and 439.24 is: 659.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    828.94 : 1,244.49 = 439.24 : x
  2. Step 2: Convert to fraction form
    828.94/1,244.49 = 439.24/x
  3. Step 3: Cross multiply
    828.94x = 1,244.49 × 439.24
  4. Step 4: Simplify right side
    828.94x = 546,629.79
  5. Step 5: Solve for x
    x = 546,629.79/828.94
  6. Step 6: Final answer
    x = 659.43

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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.