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Finding the Fourth Proportional to 618,902.12, 854,364.77 and 389,796.11

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Solution

The fourth proportional to 618,902.12, 854,364.77 and 389,796.11 is: 538,094.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,902.12 : 854,364.77 = 389,796.11 : x
  2. Step 2: Convert to fraction form
    618,902.12/854,364.77 = 389,796.11/x
  3. Step 3: Cross multiply
    618,902.12x = 854,364.77 × 389,796.11
  4. Step 4: Simplify right side
    618,902.12x = 333,028,060,569.71
  5. Step 5: Solve for x
    x = 333,028,060,569.71/618,902.12
  6. Step 6: Final answer
    x = 538,094.88

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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.