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Finding the Fourth Proportional to 5,164,991.20, 7,747,486.80 and 2,013,119.20

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Solution

The fourth proportional to 5,164,991.20, 7,747,486.80 and 2,013,119.20 is: 3,019,678.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,164,991.20 : 7,747,486.80 = 2,013,119.20 : x
  2. Step 2: Convert to fraction form
    5,164,991.20/7,747,486.80 = 2,013,119.20/x
  3. Step 3: Cross multiply
    5,164,991.20x = 7,747,486.80 × 2,013,119.20
  4. Step 4: Simplify right side
    5,164,991.20x = 15,596,614,428,826.56
  5. Step 5: Solve for x
    x = 15,596,614,428,826.56/5,164,991.20
  6. Step 6: Final answer
    x = 3,019,678.80

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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.