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Finding the Fourth Proportional to 693,784.43, 957,717.64 and 421,939.64

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Solution

The fourth proportional to 693,784.43, 957,717.64 and 421,939.64 is: 582,456.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,784.43 : 957,717.64 = 421,939.64 : x
  2. Step 2: Convert to fraction form
    693,784.43/957,717.64 = 421,939.64/x
  3. Step 3: Cross multiply
    693,784.43x = 957,717.64 × 421,939.64
  4. Step 4: Simplify right side
    693,784.43x = 404,099,036,791.56
  5. Step 5: Solve for x
    x = 404,099,036,791.56/693,784.43
  6. Step 6: Final answer
    x = 582,456.19

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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.