Home / 685,123.94-945,392.15-394,777.82

Finding the Fourth Proportional to 685,123.94, 945,392.15 and 394,777.82

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Solution

The fourth proportional to 685,123.94, 945,392.15 and 394,777.82 is: 544,747.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,123.94 : 945,392.15 = 394,777.82 : x
  2. Step 2: Convert to fraction form
    685,123.94/945,392.15 = 394,777.82/x
  3. Step 3: Cross multiply
    685,123.94x = 945,392.15 × 394,777.82
  4. Step 4: Simplify right side
    685,123.94x = 373,219,845,321.26
  5. Step 5: Solve for x
    x = 373,219,845,321.26/685,123.94
  6. Step 6: Final answer
    x = 544,747.93

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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.