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Finding the Fourth Proportional to 574.31, 792.87 and 439.46

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Solution

The fourth proportional to 574.31, 792.87 and 439.46 is: 606.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.31 : 792.87 = 439.46 : x
  2. Step 2: Convert to fraction form
    574.31/792.87 = 439.46/x
  3. Step 3: Cross multiply
    574.31x = 792.87 × 439.46
  4. Step 4: Simplify right side
    574.31x = 348,434.54
  5. Step 5: Solve for x
    x = 348,434.54/574.31
  6. Step 6: Final answer
    x = 606.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.