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Finding the Fourth Proportional to 1,978,692.96, 2,726,864.40 and 1,585,779.62

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Solution

The fourth proportional to 1,978,692.96, 2,726,864.40 and 1,585,779.62 is: 2,185,385.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,978,692.96 : 2,726,864.40 = 1,585,779.62 : x
  2. Step 2: Convert to fraction form
    1,978,692.96/2,726,864.40 = 1,585,779.62/x
  3. Step 3: Cross multiply
    1,978,692.96x = 2,726,864.40 × 1,585,779.62
  4. Step 4: Simplify right side
    1,978,692.96x = 4,324,205,978,389.21
  5. Step 5: Solve for x
    x = 4,324,205,978,389.21/1,978,692.96
  6. Step 6: Final answer
    x = 2,185,385.03

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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.