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Finding the Fourth Proportional to 382.96, 528.90 and 330.76

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Solution

The fourth proportional to 382.96, 528.90 and 330.76 is: 456.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.96 : 528.90 = 330.76 : x
  2. Step 2: Convert to fraction form
    382.96/528.90 = 330.76/x
  3. Step 3: Cross multiply
    382.96x = 528.90 × 330.76
  4. Step 4: Simplify right side
    382.96x = 174,938.96
  5. Step 5: Solve for x
    x = 174,938.96/382.96
  6. Step 6: Final answer
    x = 456.81

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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.