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Finding the Fourth Proportional to 395.07, 591.99 and 221.52

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Solution

The fourth proportional to 395.07, 591.99 and 221.52 is: 331.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.07 : 591.99 = 221.52 : x
  2. Step 2: Convert to fraction form
    395.07/591.99 = 221.52/x
  3. Step 3: Cross multiply
    395.07x = 591.99 × 221.52
  4. Step 4: Simplify right side
    395.07x = 131,137.62
  5. Step 5: Solve for x
    x = 131,137.62/395.07
  6. Step 6: Final answer
    x = 331.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.