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Finding the Fourth Proportional to 685,425.98, 945,897.86 and 394,877.25

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Solution

The fourth proportional to 685,425.98, 945,897.86 and 394,877.25 is: 544,936.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,425.98 : 945,897.86 = 394,877.25 : x
  2. Step 2: Convert to fraction form
    685,425.98/945,897.86 = 394,877.25/x
  3. Step 3: Cross multiply
    685,425.98x = 945,897.86 × 394,877.25
  4. Step 4: Simplify right side
    685,425.98x = 373,513,546,724.88
  5. Step 5: Solve for x
    x = 373,513,546,724.88/685,425.98
  6. Step 6: Final answer
    x = 544,936.37

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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.