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Finding the Fourth Proportional to 850.62, 1,274.91 and 439.54

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Solution

The fourth proportional to 850.62, 1,274.91 and 439.54 is: 658.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    850.62 : 1,274.91 = 439.54 : x
  2. Step 2: Convert to fraction form
    850.62/1,274.91 = 439.54/x
  3. Step 3: Cross multiply
    850.62x = 1,274.91 × 439.54
  4. Step 4: Simplify right side
    850.62x = 560,365.37
  5. Step 5: Solve for x
    x = 560,365.37/850.62
  6. Step 6: Final answer
    x = 658.77

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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.