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Finding the Fourth Proportional to 618,886.56, 854,343.24 and 389,780.52

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Solution

The fourth proportional to 618,886.56, 854,343.24 and 389,780.52 is: 538,073.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,886.56 : 854,343.24 = 389,780.52 : x
  2. Step 2: Convert to fraction form
    618,886.56/854,343.24 = 389,780.52/x
  3. Step 3: Cross multiply
    618,886.56x = 854,343.24 × 389,780.52
  4. Step 4: Simplify right side
    618,886.56x = 333,006,352,345.69
  5. Step 5: Solve for x
    x = 333,006,352,345.69/618,886.56
  6. Step 6: Final answer
    x = 538,073.33

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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.