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Finding the Fourth Proportional to 179.64, 268.80 and 131.28

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Solution

The fourth proportional to 179.64, 268.80 and 131.28 is: 196.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.64 : 268.80 = 131.28 : x
  2. Step 2: Convert to fraction form
    179.64/268.80 = 131.28/x
  3. Step 3: Cross multiply
    179.64x = 268.80 × 131.28
  4. Step 4: Simplify right side
    179.64x = 35,288.06
  5. Step 5: Solve for x
    x = 35,288.06/179.64
  6. Step 6: Final answer
    x = 196.44

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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.