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Finding the Fourth Proportional to 382.39, 528.15 and 303.97

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Solution

The fourth proportional to 382.39, 528.15 and 303.97 is: 419.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.39 : 528.15 = 303.97 : x
  2. Step 2: Convert to fraction form
    382.39/528.15 = 303.97/x
  3. Step 3: Cross multiply
    382.39x = 528.15 × 303.97
  4. Step 4: Simplify right side
    382.39x = 160,542.57
  5. Step 5: Solve for x
    x = 160,542.57/382.39
  6. Step 6: Final answer
    x = 419.84

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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.