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Finding the Fourth Proportional to 823,936.80, 1,235,905.20 and 823,936.80

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Solution

The fourth proportional to 823,936.80, 1,235,905.20 and 823,936.80 is: 1,235,905.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    823,936.80 : 1,235,905.20 = 823,936.80 : x
  2. Step 2: Convert to fraction form
    823,936.80/1,235,905.20 = 823,936.80/x
  3. Step 3: Cross multiply
    823,936.80x = 1,235,905.20 × 823,936.80
  4. Step 4: Simplify right side
    823,936.80x = 1,018,307,775,591.36
  5. Step 5: Solve for x
    x = 1,018,307,775,591.36/823,936.80
  6. Step 6: Final answer
    x = 1,235,905.20

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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.