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Finding the Fourth Proportional to 850.52, 1,276.48 and 439.79

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Solution

The fourth proportional to 850.52, 1,276.48 and 439.79 is: 660.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    850.52 : 1,276.48 = 439.79 : x
  2. Step 2: Convert to fraction form
    850.52/1,276.48 = 439.79/x
  3. Step 3: Cross multiply
    850.52x = 1,276.48 × 439.79
  4. Step 4: Simplify right side
    850.52x = 561,377.31
  5. Step 5: Solve for x
    x = 561,377.31/850.52
  6. Step 6: Final answer
    x = 660.04

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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.