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Finding the Fourth Proportional to 643,183.53, 887,647.78 and 356,795.88

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Solution

The fourth proportional to 643,183.53, 887,647.78 and 356,795.88 is: 492,408.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,183.53 : 887,647.78 = 356,795.88 : x
  2. Step 2: Convert to fraction form
    643,183.53/887,647.78 = 356,795.88/x
  3. Step 3: Cross multiply
    643,183.53x = 887,647.78 × 356,795.88
  4. Step 4: Simplify right side
    643,183.53x = 316,709,070,795.15
  5. Step 5: Solve for x
    x = 316,709,070,795.15/643,183.53
  6. Step 6: Final answer
    x = 492,408.55

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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.