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Finding the Fourth Proportional to 693,912.96, 957,636 and 421,936.56

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Solution

The fourth proportional to 693,912.96, 957,636 and 421,936.56 is: 582,294.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,912.96 : 957,636 = 421,936.56 : x
  2. Step 2: Convert to fraction form
    693,912.96/957,636 = 421,936.56/x
  3. Step 3: Cross multiply
    693,912.96x = 957,636 × 421,936.56
  4. Step 4: Simplify right side
    693,912.96x = 404,061,639,572.16
  5. Step 5: Solve for x
    x = 404,061,639,572.16/693,912.96
  6. Step 6: Final answer
    x = 582,294.41

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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.