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Finding the Fourth Proportional to 375.90, 518.45 and 326.70

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Solution

The fourth proportional to 375.90, 518.45 and 326.70 is: 450.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    375.90 : 518.45 = 326.70 : x
  2. Step 2: Convert to fraction form
    375.90/518.45 = 326.70/x
  3. Step 3: Cross multiply
    375.90x = 518.45 × 326.70
  4. Step 4: Simplify right side
    375.90x = 169,375.98
  5. Step 5: Solve for x
    x = 169,375.98/375.90
  6. Step 6: Final answer
    x = 450.59

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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.