Home / 428,408.11-641,936.24-158,164.62

Finding the Fourth Proportional to 428,408.11, 641,936.24 and 158,164.62

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Solution

The fourth proportional to 428,408.11, 641,936.24 and 158,164.62 is: 236,997.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,408.11 : 641,936.24 = 158,164.62 : x
  2. Step 2: Convert to fraction form
    428,408.11/641,936.24 = 158,164.62/x
  3. Step 3: Cross multiply
    428,408.11x = 641,936.24 × 158,164.62
  4. Step 4: Simplify right side
    428,408.11x = 101,531,598,858.86
  5. Step 5: Solve for x
    x = 101,531,598,858.86/428,408.11
  6. Step 6: Final answer
    x = 236,997.38

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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.