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Finding the Fourth Proportional to 1,187,856,794.98, 1,639,244,000.36 and 644,697,747.60

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Solution

The fourth proportional to 1,187,856,794.98, 1,639,244,000.36 and 644,697,747.60 is: 889,683,772.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,856,794.98 : 1,639,244,000.36 = 644,697,747.60 : x
  2. Step 2: Convert to fraction form
    1,187,856,794.98/1,639,244,000.36 = 644,697,747.60/x
  3. Step 3: Cross multiply
    1,187,856,794.98x = 1,639,244,000.36 × 644,697,747.60
  4. Step 4: Simplify right side
    1,187,856,794.98x = 1,056,816,914,796,888,064
  5. Step 5: Solve for x
    x = 1,056,816,914,796,888,064/1,187,856,794.98
  6. Step 6: Final answer
    x = 889,683,772.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.