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Finding the Fourth Proportional to 379.38, 522.26 and 280.95

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Solution

The fourth proportional to 379.38, 522.26 and 280.95 is: 386.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.38 : 522.26 = 280.95 : x
  2. Step 2: Convert to fraction form
    379.38/522.26 = 280.95/x
  3. Step 3: Cross multiply
    379.38x = 522.26 × 280.95
  4. Step 4: Simplify right side
    379.38x = 146,727.54
  5. Step 5: Solve for x
    x = 146,727.54/379.38
  6. Step 6: Final answer
    x = 386.76

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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.