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Finding the Fourth Proportional to 986,607.40, 1,479,911.10 and 785,840.80

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Solution

The fourth proportional to 986,607.40, 1,479,911.10 and 785,840.80 is: 1,178,761.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    986,607.40 : 1,479,911.10 = 785,840.80 : x
  2. Step 2: Convert to fraction form
    986,607.40/1,479,911.10 = 785,840.80/x
  3. Step 3: Cross multiply
    986,607.40x = 1,479,911.10 × 785,840.80
  4. Step 4: Simplify right side
    986,607.40x = 1,162,974,522,752.88
  5. Step 5: Solve for x
    x = 1,162,974,522,752.88/986,607.40
  6. Step 6: Final answer
    x = 1,178,761.20

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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.