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Finding the Fourth Proportional to 685,907.70, 946,542.41 and 379,983.45

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Solution

The fourth proportional to 685,907.70, 946,542.41 and 379,983.45 is: 524,371.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,907.70 : 946,542.41 = 379,983.45 : x
  2. Step 2: Convert to fraction form
    685,907.70/946,542.41 = 379,983.45/x
  3. Step 3: Cross multiply
    685,907.70x = 946,542.41 × 379,983.45
  4. Step 4: Simplify right side
    685,907.70x = 359,670,448,623.20
  5. Step 5: Solve for x
    x = 359,670,448,623.20/685,907.70
  6. Step 6: Final answer
    x = 524,371.50

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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.