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Finding the Fourth Proportional to 579.38, 799.25 and 392.81

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Solution

The fourth proportional to 579.38, 799.25 and 392.81 is: 541.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.38 : 799.25 = 392.81 : x
  2. Step 2: Convert to fraction form
    579.38/799.25 = 392.81/x
  3. Step 3: Cross multiply
    579.38x = 799.25 × 392.81
  4. Step 4: Simplify right side
    579.38x = 313,947.43
  5. Step 5: Solve for x
    x = 313,947.43/579.38
  6. Step 6: Final answer
    x = 541.87

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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.