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Finding the Fourth Proportional to 1,291,739.94, 1,936,352.97 and 617,646.39

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Solution

The fourth proportional to 1,291,739.94, 1,936,352.97 and 617,646.39 is: 925,868.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,291,739.94 : 1,936,352.97 = 617,646.39 : x
  2. Step 2: Convert to fraction form
    1,291,739.94/1,936,352.97 = 617,646.39/x
  3. Step 3: Cross multiply
    1,291,739.94x = 1,936,352.97 × 617,646.39
  4. Step 4: Simplify right side
    1,291,739.94x = 1,195,981,421,686.28
  5. Step 5: Solve for x
    x = 1,195,981,421,686.28/1,291,739.94
  6. Step 6: Final answer
    x = 925,868.58

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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.