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Finding the Fourth Proportional to 382.09, 527.26 and 216.31

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Solution

The fourth proportional to 382.09, 527.26 and 216.31 is: 298.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.09 : 527.26 = 216.31 : x
  2. Step 2: Convert to fraction form
    382.09/527.26 = 216.31/x
  3. Step 3: Cross multiply
    382.09x = 527.26 × 216.31
  4. Step 4: Simplify right side
    382.09x = 114,051.61
  5. Step 5: Solve for x
    x = 114,051.61/382.09
  6. Step 6: Final answer
    x = 298.49

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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.