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Finding the Fourth Proportional to 685,004.90, 945,305.43 and 383,198.90

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Solution

The fourth proportional to 685,004.90, 945,305.43 and 383,198.90 is: 528,813.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,004.90 : 945,305.43 = 383,198.90 : x
  2. Step 2: Convert to fraction form
    685,004.90/945,305.43 = 383,198.90/x
  3. Step 3: Cross multiply
    685,004.90x = 945,305.43 × 383,198.90
  4. Step 4: Simplify right side
    685,004.90x = 362,240,000,940.03
  5. Step 5: Solve for x
    x = 362,240,000,940.03/685,004.90
  6. Step 6: Final answer
    x = 528,813.74

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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.