Home / 858,305.56-1,287,578.64-259,198.78

Finding the Fourth Proportional to 858,305.56, 1,287,578.64 and 259,198.78

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Solution

The fourth proportional to 858,305.56, 1,287,578.64 and 259,198.78 is: 388,834.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,305.56 : 1,287,578.64 = 259,198.78 : x
  2. Step 2: Convert to fraction form
    858,305.56/1,287,578.64 = 259,198.78/x
  3. Step 3: Cross multiply
    858,305.56x = 1,287,578.64 × 259,198.78
  4. Step 4: Simplify right side
    858,305.56x = 333,738,812,642.06
  5. Step 5: Solve for x
    x = 333,738,812,642.06/858,305.56
  6. Step 6: Final answer
    x = 388,834.50

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1.5x scale

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.