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Finding the Fourth Proportional to 1,971,871.89, 2,721,183.21 and 1,066,453.89

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Solution

The fourth proportional to 1,971,871.89, 2,721,183.21 and 1,066,453.89 is: 1,471,706.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,971,871.89 : 2,721,183.21 = 1,066,453.89 : x
  2. Step 2: Convert to fraction form
    1,971,871.89/2,721,183.21 = 1,066,453.89/x
  3. Step 3: Cross multiply
    1,971,871.89x = 2,721,183.21 × 1,066,453.89
  4. Step 4: Simplify right side
    1,971,871.89x = 2,902,016,419,707.19
  5. Step 5: Solve for x
    x = 2,902,016,419,707.19/1,971,871.89
  6. Step 6: Final answer
    x = 1,471,706.37

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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.