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Finding the Fourth Proportional to 379.91, 523.91 and 351.63

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Solution

The fourth proportional to 379.91, 523.91 and 351.63 is: 484.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.91 : 523.91 = 351.63 : x
  2. Step 2: Convert to fraction form
    379.91/523.91 = 351.63/x
  3. Step 3: Cross multiply
    379.91x = 523.91 × 351.63
  4. Step 4: Simplify right side
    379.91x = 184,219.85
  5. Step 5: Solve for x
    x = 184,219.85/379.91
  6. Step 6: Final answer
    x = 484.91

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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.