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Finding the Fourth Proportional to 327.06, 490.77 and 189.90

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Solution

The fourth proportional to 327.06, 490.77 and 189.90 is: 284.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    327.06 : 490.77 = 189.90 : x
  2. Step 2: Convert to fraction form
    327.06/490.77 = 189.90/x
  3. Step 3: Cross multiply
    327.06x = 490.77 × 189.90
  4. Step 4: Simplify right side
    327.06x = 93,197.22
  5. Step 5: Solve for x
    x = 93,197.22/327.06
  6. Step 6: Final answer
    x = 284.95

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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.