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Finding the Fourth Proportional to 327.64, 491.28 and 165.22

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Solution

The fourth proportional to 327.64, 491.28 and 165.22 is: 247.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    327.64 : 491.28 = 165.22 : x
  2. Step 2: Convert to fraction form
    327.64/491.28 = 165.22/x
  3. Step 3: Cross multiply
    327.64x = 491.28 × 165.22
  4. Step 4: Simplify right side
    327.64x = 81,169.28
  5. Step 5: Solve for x
    x = 81,169.28/327.64
  6. Step 6: Final answer
    x = 247.74

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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.