Home / 1,398,653.30-1,930,138.79-786,806.54

Finding the Fourth Proportional to 1,398,653.30, 1,930,138.79 and 786,806.54

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Solution

The fourth proportional to 1,398,653.30, 1,930,138.79 and 786,806.54 is: 1,085,791.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398,653.30 : 1,930,138.79 = 786,806.54 : x
  2. Step 2: Convert to fraction form
    1,398,653.30/1,930,138.79 = 786,806.54/x
  3. Step 3: Cross multiply
    1,398,653.30x = 1,930,138.79 × 786,806.54
  4. Step 4: Simplify right side
    1,398,653.30x = 1,518,645,816,732.98
  5. Step 5: Solve for x
    x = 1,518,645,816,732.98/1,398,653.30
  6. Step 6: Final answer
    x = 1,085,791.46

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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.