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Finding the Fourth Proportional to 618,887.56, 854,344.62 and 389,781.52

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Solution

The fourth proportional to 618,887.56, 854,344.62 and 389,781.52 is: 538,074.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,887.56 : 854,344.62 = 389,781.52 : x
  2. Step 2: Convert to fraction form
    618,887.56/854,344.62 = 389,781.52/x
  3. Step 3: Cross multiply
    618,887.56x = 854,344.62 × 389,781.52
  4. Step 4: Simplify right side
    618,887.56x = 333,007,744,587.42
  5. Step 5: Solve for x
    x = 333,007,744,587.42/618,887.56
  6. Step 6: Final answer
    x = 538,074.71

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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.