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Finding the Fourth Proportional to 327.24, 490.78 and 134.72

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Solution

The fourth proportional to 327.24, 490.78 and 134.72 is: 202.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    327.24 : 490.78 = 134.72 : x
  2. Step 2: Convert to fraction form
    327.24/490.78 = 134.72/x
  3. Step 3: Cross multiply
    327.24x = 490.78 × 134.72
  4. Step 4: Simplify right side
    327.24x = 66,117.88
  5. Step 5: Solve for x
    x = 66,117.88/327.24
  6. Step 6: Final answer
    x = 202.05

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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.