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Finding the Fourth Proportional to 726,729.60, 1,018,471.20 and 726,729.60

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Solution

The fourth proportional to 726,729.60, 1,018,471.20 and 726,729.60 is: 1,018,471.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    726,729.60 : 1,018,471.20 = 726,729.60 : x
  2. Step 2: Convert to fraction form
    726,729.60/1,018,471.20 = 726,729.60/x
  3. Step 3: Cross multiply
    726,729.60x = 1,018,471.20 × 726,729.60
  4. Step 4: Simplify right side
    726,729.60x = 740,153,167,787.52
  5. Step 5: Solve for x
    x = 740,153,167,787.52/726,729.60
  6. Step 6: Final answer
    x = 1,018,471.20

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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.