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Finding the Fourth Proportional to 1,978,696.14, 2,726,868.78 and 1,585,782.81

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Solution

The fourth proportional to 1,978,696.14, 2,726,868.78 and 1,585,782.81 is: 2,185,389.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,978,696.14 : 2,726,868.78 = 1,585,782.81 : x
  2. Step 2: Convert to fraction form
    1,978,696.14/2,726,868.78 = 1,585,782.81/x
  3. Step 3: Cross multiply
    1,978,696.14x = 2,726,868.78 × 1,585,782.81
  4. Step 4: Simplify right side
    1,978,696.14x = 4,324,221,636,449.67
  5. Step 5: Solve for x
    x = 4,324,221,636,449.67/1,978,696.14
  6. Step 6: Final answer
    x = 2,185,389.43

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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.