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Finding the Fourth Proportional to 255.92, 382.21 and 204.64

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Solution

The fourth proportional to 255.92, 382.21 and 204.64 is: 305.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.92 : 382.21 = 204.64 : x
  2. Step 2: Convert to fraction form
    255.92/382.21 = 204.64/x
  3. Step 3: Cross multiply
    255.92x = 382.21 × 204.64
  4. Step 4: Simplify right side
    255.92x = 78,215.45
  5. Step 5: Solve for x
    x = 78,215.45/255.92
  6. Step 6: Final answer
    x = 305.62

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.