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Finding the Fourth Proportional to 1,981,806.40, 2,972,126.40 and 561,986.56

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Solution

The fourth proportional to 1,981,806.40, 2,972,126.40 and 561,986.56 is: 842,814.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,981,806.40 : 2,972,126.40 = 561,986.56 : x
  2. Step 2: Convert to fraction form
    1,981,806.40/2,972,126.40 = 561,986.56/x
  3. Step 3: Cross multiply
    1,981,806.40x = 2,972,126.40 × 561,986.56
  4. Step 4: Simplify right side
    1,981,806.40x = 1,670,295,091,421.18
  5. Step 5: Solve for x
    x = 1,670,295,091,421.18/1,981,806.40
  6. Step 6: Final answer
    x = 842,814.46

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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.