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Finding the Fourth Proportional to 621,221.82, 857,293.41 and 376,202.19

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Solution

The fourth proportional to 621,221.82, 857,293.41 and 376,202.19 is: 519,163.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,221.82 : 857,293.41 = 376,202.19 : x
  2. Step 2: Convert to fraction form
    621,221.82/857,293.41 = 376,202.19/x
  3. Step 3: Cross multiply
    621,221.82x = 857,293.41 × 376,202.19
  4. Step 4: Simplify right side
    621,221.82x = 322,515,658,314.57
  5. Step 5: Solve for x
    x = 322,515,658,314.57/621,221.82
  6. Step 6: Final answer
    x = 519,163.44

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Double scale
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Similar ratio
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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.