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Finding the Fourth Proportional to 656,041.05, 905,027.12 and 383,940.39

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Solution

The fourth proportional to 656,041.05, 905,027.12 and 383,940.39 is: 529,656.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,041.05 : 905,027.12 = 383,940.39 : x
  2. Step 2: Convert to fraction form
    656,041.05/905,027.12 = 383,940.39/x
  3. Step 3: Cross multiply
    656,041.05x = 905,027.12 × 383,940.39
  4. Step 4: Simplify right side
    656,041.05x = 347,476,463,493.68
  5. Step 5: Solve for x
    x = 347,476,463,493.68/656,041.05
  6. Step 6: Final answer
    x = 529,656.59

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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.