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Finding the Fourth Proportional to 685,644.75, 945,875.78 and 444,005.15

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Solution

The fourth proportional to 685,644.75, 945,875.78 and 444,005.15 is: 612,523.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,644.75 : 945,875.78 = 444,005.15 : x
  2. Step 2: Convert to fraction form
    685,644.75/945,875.78 = 444,005.15/x
  3. Step 3: Cross multiply
    685,644.75x = 945,875.78 × 444,005.15
  4. Step 4: Simplify right side
    685,644.75x = 419,973,712,295.88
  5. Step 5: Solve for x
    x = 419,973,712,295.88/685,644.75
  6. Step 6: Final answer
    x = 612,523.78

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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.