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Finding the Fourth Proportional to 165.28, 246.86 and 131.08

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Solution

The fourth proportional to 165.28, 246.86 and 131.08 is: 195.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.28 : 246.86 = 131.08 : x
  2. Step 2: Convert to fraction form
    165.28/246.86 = 131.08/x
  3. Step 3: Cross multiply
    165.28x = 246.86 × 131.08
  4. Step 4: Simplify right side
    165.28x = 32,358.41
  5. Step 5: Solve for x
    x = 32,358.41/165.28
  6. Step 6: Final answer
    x = 195.78

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.