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Finding the Fourth Proportional to 724,921.20, 1,016,989.20 and 724,921.20

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Solution

The fourth proportional to 724,921.20, 1,016,989.20 and 724,921.20 is: 1,016,989.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,921.20 : 1,016,989.20 = 724,921.20 : x
  2. Step 2: Convert to fraction form
    724,921.20/1,016,989.20 = 724,921.20/x
  3. Step 3: Cross multiply
    724,921.20x = 1,016,989.20 × 724,921.20
  4. Step 4: Simplify right side
    724,921.20x = 737,237,031,251.04
  5. Step 5: Solve for x
    x = 737,237,031,251.04/724,921.20
  6. Step 6: Final answer
    x = 1,016,989.20

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.