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Finding the Fourth Proportional to 986,605.40, 1,479,908.10 and 785,838.80

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Solution

The fourth proportional to 986,605.40, 1,479,908.10 and 785,838.80 is: 1,178,758.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    986,605.40 : 1,479,908.10 = 785,838.80 : x
  2. Step 2: Convert to fraction form
    986,605.40/1,479,908.10 = 785,838.80/x
  3. Step 3: Cross multiply
    986,605.40x = 1,479,908.10 × 785,838.80
  4. Step 4: Simplify right side
    986,605.40x = 1,162,969,205,414.28
  5. Step 5: Solve for x
    x = 1,162,969,205,414.28/986,605.40
  6. Step 6: Final answer
    x = 1,178,758.20

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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.