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Finding the Fourth Proportional to 576, 863.22 and 315.61

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Solution

The fourth proportional to 576, 863.22 and 315.61 is: 472.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    576 : 863.22 = 315.61 : x
  2. Step 2: Convert to fraction form
    576/863.22 = 315.61/x
  3. Step 3: Cross multiply
    576x = 863.22 × 315.61
  4. Step 4: Simplify right side
    576x = 272,440.86
  5. Step 5: Solve for x
    x = 272,440.86/576
  6. Step 6: Final answer
    x = 472.99

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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.