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Finding the Fourth Proportional to 1,138,888, 1,571,529 and 629,521.12

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Solution

The fourth proportional to 1,138,888, 1,571,529 and 629,521.12 is: 868,663.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,138,888 : 1,571,529 = 629,521.12 : x
  2. Step 2: Convert to fraction form
    1,138,888/1,571,529 = 629,521.12/x
  3. Step 3: Cross multiply
    1,138,888x = 1,571,529 × 629,521.12
  4. Step 4: Simplify right side
    1,138,888x = 989,310,696,192.48
  5. Step 5: Solve for x
    x = 989,310,696,192.48/1,138,888
  6. Step 6: Final answer
    x = 868,663.73

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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.