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Finding the Fourth Proportional to 382.32, 527.16 and 320.40

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Solution

The fourth proportional to 382.32, 527.16 and 320.40 is: 441.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.32 : 527.16 = 320.40 : x
  2. Step 2: Convert to fraction form
    382.32/527.16 = 320.40/x
  3. Step 3: Cross multiply
    382.32x = 527.16 × 320.40
  4. Step 4: Simplify right side
    382.32x = 168,902.06
  5. Step 5: Solve for x
    x = 168,902.06/382.32
  6. Step 6: Final answer
    x = 441.78

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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.