Home / 428,921.96-643,163.24-226,626.66

Finding the Fourth Proportional to 428,921.96, 643,163.24 and 226,626.66

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Solution

The fourth proportional to 428,921.96, 643,163.24 and 226,626.66 is: 339,823.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,921.96 : 643,163.24 = 226,626.66 : x
  2. Step 2: Convert to fraction form
    428,921.96/643,163.24 = 226,626.66/x
  3. Step 3: Cross multiply
    428,921.96x = 643,163.24 × 226,626.66
  4. Step 4: Simplify right side
    428,921.96x = 145,757,936,915.98
  5. Step 5: Solve for x
    x = 145,757,936,915.98/428,921.96
  6. Step 6: Final answer
    x = 339,823.91

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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.