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Finding the Fourth Proportional to 278.92, 384.81 and 204.33

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Solution

The fourth proportional to 278.92, 384.81 and 204.33 is: 281.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.92 : 384.81 = 204.33 : x
  2. Step 2: Convert to fraction form
    278.92/384.81 = 204.33/x
  3. Step 3: Cross multiply
    278.92x = 384.81 × 204.33
  4. Step 4: Simplify right side
    278.92x = 78,628.23
  5. Step 5: Solve for x
    x = 78,628.23/278.92
  6. Step 6: Final answer
    x = 281.90

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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.