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Finding the Fourth Proportional to 693,915.96, 957,640.14 and 421,939.56

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Solution

The fourth proportional to 693,915.96, 957,640.14 and 421,939.56 is: 582,298.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,915.96 : 957,640.14 = 421,939.56 : x
  2. Step 2: Convert to fraction form
    693,915.96/957,640.14 = 421,939.56/x
  3. Step 3: Cross multiply
    693,915.96x = 957,640.14 × 421,939.56
  4. Step 4: Simplify right side
    693,915.96x = 404,066,259,309.94
  5. Step 5: Solve for x
    x = 404,066,259,309.94/693,915.96
  6. Step 6: Final answer
    x = 582,298.55

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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.