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Finding the Fourth Proportional to 1,969,779.88, 2,719,323.69 and 1,398,185.56

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Solution

The fourth proportional to 1,969,779.88, 2,719,323.69 and 1,398,185.56 is: 1,930,225.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,969,779.88 : 2,719,323.69 = 1,398,185.56 : x
  2. Step 2: Convert to fraction form
    1,969,779.88/2,719,323.69 = 1,398,185.56/x
  3. Step 3: Cross multiply
    1,969,779.88x = 2,719,323.69 × 1,398,185.56
  4. Step 4: Simplify right side
    1,969,779.88x = 3,802,119,116,323.92
  5. Step 5: Solve for x
    x = 3,802,119,116,323.92/1,969,779.88
  6. Step 6: Final answer
    x = 1,930,225.38

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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.