Home / 812,379.93-1,121,006.46-449,790.54

Finding the Fourth Proportional to 812,379.93, 1,121,006.46 and 449,790.54

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Solution

The fourth proportional to 812,379.93, 1,121,006.46 and 449,790.54 is: 620,667.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,379.93 : 1,121,006.46 = 449,790.54 : x
  2. Step 2: Convert to fraction form
    812,379.93/1,121,006.46 = 449,790.54/x
  3. Step 3: Cross multiply
    812,379.93x = 1,121,006.46 × 449,790.54
  4. Step 4: Simplify right side
    812,379.93x = 504,218,100,986.89
  5. Step 5: Solve for x
    x = 504,218,100,986.89/812,379.93
  6. Step 6: Final answer
    x = 620,667.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.