Home / 2,138,857.70-3,205,694.55-1,238,569.70

Finding the Fourth Proportional to 2,138,857.70, 3,205,694.55 and 1,238,569.70

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Solution

The fourth proportional to 2,138,857.70, 3,205,694.55 and 1,238,569.70 is: 1,856,353.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,138,857.70 : 3,205,694.55 = 1,238,569.70 : x
  2. Step 2: Convert to fraction form
    2,138,857.70/3,205,694.55 = 1,238,569.70/x
  3. Step 3: Cross multiply
    2,138,857.70x = 3,205,694.55 × 1,238,569.70
  4. Step 4: Simplify right side
    2,138,857.70x = 3,970,476,137,085.14
  5. Step 5: Solve for x
    x = 3,970,476,137,085.14/2,138,857.70
  6. Step 6: Final answer
    x = 1,856,353.57

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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.