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Finding the Fourth Proportional to 379.08, 521.82 and 320.76

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Solution

The fourth proportional to 379.08, 521.82 and 320.76 is: 441.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.08 : 521.82 = 320.76 : x
  2. Step 2: Convert to fraction form
    379.08/521.82 = 320.76/x
  3. Step 3: Cross multiply
    379.08x = 521.82 × 320.76
  4. Step 4: Simplify right side
    379.08x = 167,378.98
  5. Step 5: Solve for x
    x = 167,378.98/379.08
  6. Step 6: Final answer
    x = 441.54

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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.