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Finding the Fourth Proportional to 386.28, 532.31 and 327.96

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Solution

The fourth proportional to 386.28, 532.31 and 327.96 is: 451.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.28 : 532.31 = 327.96 : x
  2. Step 2: Convert to fraction form
    386.28/532.31 = 327.96/x
  3. Step 3: Cross multiply
    386.28x = 532.31 × 327.96
  4. Step 4: Simplify right side
    386.28x = 174,574.75
  5. Step 5: Solve for x
    x = 174,574.75/386.28
  6. Step 6: Final answer
    x = 451.94

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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.