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Finding the Fourth Proportional to 1,968,457.78, 2,716,471.76 and 1,063,039.78

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Solution

The fourth proportional to 1,968,457.78, 2,716,471.76 and 1,063,039.78 is: 1,466,994.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,968,457.78 : 2,716,471.76 = 1,063,039.78 : x
  2. Step 2: Convert to fraction form
    1,968,457.78/2,716,471.76 = 1,063,039.78/x
  3. Step 3: Cross multiply
    1,968,457.78x = 2,716,471.76 × 1,063,039.78
  4. Step 4: Simplify right side
    1,968,457.78x = 2,887,717,542,126.61
  5. Step 5: Solve for x
    x = 2,887,717,542,126.61/1,968,457.78
  6. Step 6: Final answer
    x = 1,466,994.91

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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.