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Finding the Fourth Proportional to 685,445.84, 945,783.92 and 443,694.88

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Solution

The fourth proportional to 685,445.84, 945,783.92 and 443,694.88 is: 612,213.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,445.84 : 945,783.92 = 443,694.88 : x
  2. Step 2: Convert to fraction form
    685,445.84/945,783.92 = 443,694.88/x
  3. Step 3: Cross multiply
    685,445.84x = 945,783.92 × 443,694.88
  4. Step 4: Simplify right side
    685,445.84x = 419,639,482,890.33
  5. Step 5: Solve for x
    x = 419,639,482,890.33/685,445.84
  6. Step 6: Final answer
    x = 612,213.92

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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.