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Finding the Fourth Proportional to 685,393.76, 945,843.26 and 383,587.76

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Solution

The fourth proportional to 685,393.76, 945,843.26 and 383,587.76 is: 529,351.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,393.76 : 945,843.26 = 383,587.76 : x
  2. Step 2: Convert to fraction form
    685,393.76/945,843.26 = 383,587.76/x
  3. Step 3: Cross multiply
    685,393.76x = 945,843.26 × 383,587.76
  4. Step 4: Simplify right side
    685,393.76x = 362,813,897,414.50
  5. Step 5: Solve for x
    x = 362,813,897,414.50/685,393.76
  6. Step 6: Final answer
    x = 529,351.04

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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.