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Finding the Fourth Proportional to 379.69, 523.40 and 326.95

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Solution

The fourth proportional to 379.69, 523.40 and 326.95 is: 450.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.69 : 523.40 = 326.95 : x
  2. Step 2: Convert to fraction form
    379.69/523.40 = 326.95/x
  3. Step 3: Cross multiply
    379.69x = 523.40 × 326.95
  4. Step 4: Simplify right side
    379.69x = 171,125.63
  5. Step 5: Solve for x
    x = 171,125.63/379.69
  6. Step 6: Final answer
    x = 450.70

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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.