Home / 812,020.68-1,218,112.94-279,471.64

Finding the Fourth Proportional to 812,020.68, 1,218,112.94 and 279,471.64

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Solution

The fourth proportional to 812,020.68, 1,218,112.94 and 279,471.64 is: 419,235.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,020.68 : 1,218,112.94 = 279,471.64 : x
  2. Step 2: Convert to fraction form
    812,020.68/1,218,112.94 = 279,471.64/x
  3. Step 3: Cross multiply
    812,020.68x = 1,218,112.94 × 279,471.64
  4. Step 4: Simplify right side
    812,020.68x = 340,428,021,047.02
  5. Step 5: Solve for x
    x = 340,428,021,047.02/812,020.68
  6. Step 6: Final answer
    x = 419,235.65

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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.