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Finding the Fourth Proportional to 693,891.45, 957,606.75 and 421,914.30

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Solution

The fourth proportional to 693,891.45, 957,606.75 and 421,914.30 is: 582,263.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,891.45 : 957,606.75 = 421,914.30 : x
  2. Step 2: Convert to fraction form
    693,891.45/957,606.75 = 421,914.30/x
  3. Step 3: Cross multiply
    693,891.45x = 957,606.75 × 421,914.30
  4. Step 4: Simplify right side
    693,891.45x = 404,027,981,601.53
  5. Step 5: Solve for x
    x = 404,027,981,601.53/693,891.45
  6. Step 6: Final answer
    x = 582,263.96

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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.