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Finding the Fourth Proportional to 382.35, 527.89 and 356.18

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Solution

The fourth proportional to 382.35, 527.89 and 356.18 is: 491.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.35 : 527.89 = 356.18 : x
  2. Step 2: Convert to fraction form
    382.35/527.89 = 356.18/x
  3. Step 3: Cross multiply
    382.35x = 527.89 × 356.18
  4. Step 4: Simplify right side
    382.35x = 188,023.86
  5. Step 5: Solve for x
    x = 188,023.86/382.35
  6. Step 6: Final answer
    x = 491.76

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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.