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Finding the Fourth Proportional to 376.45, 518.57 and 321.37

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Solution

The fourth proportional to 376.45, 518.57 and 321.37 is: 442.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    376.45 : 518.57 = 321.37 : x
  2. Step 2: Convert to fraction form
    376.45/518.57 = 321.37/x
  3. Step 3: Cross multiply
    376.45x = 518.57 × 321.37
  4. Step 4: Simplify right side
    376.45x = 166,651.14
  5. Step 5: Solve for x
    x = 166,651.14/376.45
  6. Step 6: Final answer
    x = 442.69

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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.