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Finding the Fourth Proportional to 621,388.14, 857,544.72 and 345,747.54

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Solution

The fourth proportional to 621,388.14, 857,544.72 and 345,747.54 is: 477,147.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,388.14 : 857,544.72 = 345,747.54 : x
  2. Step 2: Convert to fraction form
    621,388.14/857,544.72 = 345,747.54/x
  3. Step 3: Cross multiply
    621,388.14x = 857,544.72 × 345,747.54
  4. Step 4: Simplify right side
    621,388.14x = 296,493,977,379.99
  5. Step 5: Solve for x
    x = 296,493,977,379.99/621,388.14
  6. Step 6: Final answer
    x = 477,147.79

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1.5x scale

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.