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Finding the Fourth Proportional to 681,821.39, 940,705.01 and 395,284.30

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Solution

The fourth proportional to 681,821.39, 940,705.01 and 395,284.30 is: 545,371.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,821.39 : 940,705.01 = 395,284.30 : x
  2. Step 2: Convert to fraction form
    681,821.39/940,705.01 = 395,284.30/x
  3. Step 3: Cross multiply
    681,821.39x = 940,705.01 × 395,284.30
  4. Step 4: Simplify right side
    681,821.39x = 371,845,914,704.40
  5. Step 5: Solve for x
    x = 371,845,914,704.40/681,821.39
  6. Step 6: Final answer
    x = 545,371.44

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1.5x scale

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.