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Finding the Fourth Proportional to 683,940.11, 943,886.18 and 378,009.91

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Solution

The fourth proportional to 683,940.11, 943,886.18 and 378,009.91 is: 521,680.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    683,940.11 : 943,886.18 = 378,009.91 : x
  2. Step 2: Convert to fraction form
    683,940.11/943,886.18 = 378,009.91/x
  3. Step 3: Cross multiply
    683,940.11x = 943,886.18 × 378,009.91
  4. Step 4: Simplify right side
    683,940.11x = 356,798,332,076.93
  5. Step 5: Solve for x
    x = 356,798,332,076.93/683,940.11
  6. Step 6: Final answer
    x = 521,680.67

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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.