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Finding the Fourth Proportional to 433.68, 649.30 and 331.38

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Solution

The fourth proportional to 433.68, 649.30 and 331.38 is: 496.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    433.68 : 649.30 = 331.38 : x
  2. Step 2: Convert to fraction form
    433.68/649.30 = 331.38/x
  3. Step 3: Cross multiply
    433.68x = 649.30 × 331.38
  4. Step 4: Simplify right side
    433.68x = 215,165.03
  5. Step 5: Solve for x
    x = 215,165.03/433.68
  6. Step 6: Final answer
    x = 496.14

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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.