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Finding the Fourth Proportional to 327.12, 491.60 and 190.20

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Solution

The fourth proportional to 327.12, 491.60 and 190.20 is: 285.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    327.12 : 491.60 = 190.20 : x
  2. Step 2: Convert to fraction form
    327.12/491.60 = 190.20/x
  3. Step 3: Cross multiply
    327.12x = 491.60 × 190.20
  4. Step 4: Simplify right side
    327.12x = 93,501.37
  5. Step 5: Solve for x
    x = 93,501.37/327.12
  6. Step 6: Final answer
    x = 285.83

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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.