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Finding the Fourth Proportional to 412,530.21, 618,639.78 and 172,660.73

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Solution

The fourth proportional to 412,530.21, 618,639.78 and 172,660.73 is: 258,926.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,530.21 : 618,639.78 = 172,660.73 : x
  2. Step 2: Convert to fraction form
    412,530.21/618,639.78 = 172,660.73/x
  3. Step 3: Cross multiply
    412,530.21x = 618,639.78 × 172,660.73
  4. Step 4: Simplify right side
    412,530.21x = 106,814,796,021.84
  5. Step 5: Solve for x
    x = 106,814,796,021.84/412,530.21
  6. Step 6: Final answer
    x = 258,926.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.