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Finding the Fourth Proportional to 685,185.91, 945,532.44 and 379,262.88

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Solution

The fourth proportional to 685,185.91, 945,532.44 and 379,262.88 is: 523,369.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,185.91 : 945,532.44 = 379,262.88 : x
  2. Step 2: Convert to fraction form
    685,185.91/945,532.44 = 379,262.88/x
  3. Step 3: Cross multiply
    685,185.91x = 945,532.44 × 379,262.88
  4. Step 4: Simplify right side
    685,185.91x = 358,605,356,327.83
  5. Step 5: Solve for x
    x = 358,605,356,327.83/685,185.91
  6. Step 6: Final answer
    x = 523,369.43

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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.