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Finding the Fourth Proportional to 1,225,583.06, 1,691,406.77 and 681,821.28

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Solution

The fourth proportional to 1,225,583.06, 1,691,406.77 and 681,821.28 is: 940,970.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,225,583.06 : 1,691,406.77 = 681,821.28 : x
  2. Step 2: Convert to fraction form
    1,225,583.06/1,691,406.77 = 681,821.28/x
  3. Step 3: Cross multiply
    1,225,583.06x = 1,691,406.77 × 681,821.28
  4. Step 4: Simplify right side
    1,225,583.06x = 1,153,237,125,512.96
  5. Step 5: Solve for x
    x = 1,153,237,125,512.96/1,225,583.06
  6. Step 6: Final answer
    x = 940,970.19

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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.