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Finding the Fourth Proportional to 374.25, 517.83 and 321.75

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Solution

The fourth proportional to 374.25, 517.83 and 321.75 is: 445.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.25 : 517.83 = 321.75 : x
  2. Step 2: Convert to fraction form
    374.25/517.83 = 321.75/x
  3. Step 3: Cross multiply
    374.25x = 517.83 × 321.75
  4. Step 4: Simplify right side
    374.25x = 166,611.80
  5. Step 5: Solve for x
    x = 166,611.80/374.25
  6. Step 6: Final answer
    x = 445.19

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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.