Home / 858,912.80-1,288,369.20-770,339.30

Finding the Fourth Proportional to 858,912.80, 1,288,369.20 and 770,339.30

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Solution

The fourth proportional to 858,912.80, 1,288,369.20 and 770,339.30 is: 1,155,508.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,912.80 : 1,288,369.20 = 770,339.30 : x
  2. Step 2: Convert to fraction form
    858,912.80/1,288,369.20 = 770,339.30/x
  3. Step 3: Cross multiply
    858,912.80x = 1,288,369.20 × 770,339.30
  4. Step 4: Simplify right side
    858,912.80x = 992,481,427,669.56
  5. Step 5: Solve for x
    x = 992,481,427,669.56/858,912.80
  6. Step 6: Final answer
    x = 1,155,508.95

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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.