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Finding the Fourth Proportional to 386.92, 532.83 and 330.85

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Solution

The fourth proportional to 386.92, 532.83 and 330.85 is: 455.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.92 : 532.83 = 330.85 : x
  2. Step 2: Convert to fraction form
    386.92/532.83 = 330.85/x
  3. Step 3: Cross multiply
    386.92x = 532.83 × 330.85
  4. Step 4: Simplify right side
    386.92x = 176,286.81
  5. Step 5: Solve for x
    x = 176,286.81/386.92
  6. Step 6: Final answer
    x = 455.62

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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.