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Finding the Fourth Proportional to 685,216.52, 945,700.13 and 394,772.78

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Solution

The fourth proportional to 685,216.52, 945,700.13 and 394,772.78 is: 544,844.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,216.52 : 945,700.13 = 394,772.78 : x
  2. Step 2: Convert to fraction form
    685,216.52/945,700.13 = 394,772.78/x
  3. Step 3: Cross multiply
    685,216.52x = 945,700.13 × 394,772.78
  4. Step 4: Simplify right side
    685,216.52x = 373,336,669,366.46
  5. Step 5: Solve for x
    x = 373,336,669,366.46/685,216.52
  6. Step 6: Final answer
    x = 544,844.82

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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.