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Finding the Fourth Proportional to 576.24, 863.82 and 393.72

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Solution

The fourth proportional to 576.24, 863.82 and 393.72 is: 590.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.24 : 863.82 = 393.72 : x
  2. Step 2: Convert to fraction form
    576.24/863.82 = 393.72/x
  3. Step 3: Cross multiply
    576.24x = 863.82 × 393.72
  4. Step 4: Simplify right side
    576.24x = 340,103.21
  5. Step 5: Solve for x
    x = 340,103.21/576.24
  6. Step 6: Final answer
    x = 590.21

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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.