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Finding the Fourth Proportional to 496.42, 744.64 and 131.21

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Solution

The fourth proportional to 496.42, 744.64 and 131.21 is: 196.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    496.42 : 744.64 = 131.21 : x
  2. Step 2: Convert to fraction form
    496.42/744.64 = 131.21/x
  3. Step 3: Cross multiply
    496.42x = 744.64 × 131.21
  4. Step 4: Simplify right side
    496.42x = 97,704.21
  5. Step 5: Solve for x
    x = 97,704.21/496.42
  6. Step 6: Final answer
    x = 196.82

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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.