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Finding the Fourth Proportional to 455,564.71, 628,800.89 and 261,993.56

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Solution

The fourth proportional to 455,564.71, 628,800.89 and 261,993.56 is: 361,621.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,564.71 : 628,800.89 = 261,993.56 : x
  2. Step 2: Convert to fraction form
    455,564.71/628,800.89 = 261,993.56/x
  3. Step 3: Cross multiply
    455,564.71x = 628,800.89 × 261,993.56
  4. Step 4: Simplify right side
    455,564.71x = 164,741,784,922.23
  5. Step 5: Solve for x
    x = 164,741,784,922.23/455,564.71
  6. Step 6: Final answer
    x = 361,621.05

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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.