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Finding the Fourth Proportional to 382.86, 573.57 and 211.50

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Solution

The fourth proportional to 382.86, 573.57 and 211.50 is: 316.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.86 : 573.57 = 211.50 : x
  2. Step 2: Convert to fraction form
    382.86/573.57 = 211.50/x
  3. Step 3: Cross multiply
    382.86x = 573.57 × 211.50
  4. Step 4: Simplify right side
    382.86x = 121,310.06
  5. Step 5: Solve for x
    x = 121,310.06/382.86
  6. Step 6: Final answer
    x = 316.85

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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.