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Finding the Fourth Proportional to 382.86, 528.33 and 217.11

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Solution

The fourth proportional to 382.86, 528.33 and 217.11 is: 299.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.86 : 528.33 = 217.11 : x
  2. Step 2: Convert to fraction form
    382.86/528.33 = 217.11/x
  3. Step 3: Cross multiply
    382.86x = 528.33 × 217.11
  4. Step 4: Simplify right side
    382.86x = 114,705.73
  5. Step 5: Solve for x
    x = 114,705.73/382.86
  6. Step 6: Final answer
    x = 299.60

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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.