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Finding the Fourth Proportional to 683,943.89, 943,843.46 and 393,549.66

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Solution

The fourth proportional to 683,943.89, 943,843.46 and 393,549.66 is: 543,099.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    683,943.89 : 943,843.46 = 393,549.66 : x
  2. Step 2: Convert to fraction form
    683,943.89/943,843.46 = 393,549.66/x
  3. Step 3: Cross multiply
    683,943.89x = 943,843.46 × 393,549.66
  4. Step 4: Simplify right side
    683,943.89x = 371,449,270,808.48
  5. Step 5: Solve for x
    x = 371,449,270,808.48/683,943.89
  6. Step 6: Final answer
    x = 543,099.05

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Double scale
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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.