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Finding the Fourth Proportional to 664,995.38, 917,699.45 and 378,533.88

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Solution

The fourth proportional to 664,995.38, 917,699.45 and 378,533.88 is: 522,380.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,995.38 : 917,699.45 = 378,533.88 : x
  2. Step 2: Convert to fraction form
    664,995.38/917,699.45 = 378,533.88/x
  3. Step 3: Cross multiply
    664,995.38x = 917,699.45 × 378,533.88
  4. Step 4: Simplify right side
    664,995.38x = 347,380,331,589.70
  5. Step 5: Solve for x
    x = 347,380,331,589.70/664,995.38
  6. Step 6: Final answer
    x = 522,380.07

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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.