Home / 685,383.31-945,928.29-394,938.37

Finding the Fourth Proportional to 685,383.31, 945,928.29 and 394,938.37

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Solution

The fourth proportional to 685,383.31, 945,928.29 and 394,938.37 is: 545,072.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,383.31 : 945,928.29 = 394,938.37 : x
  2. Step 2: Convert to fraction form
    685,383.31/945,928.29 = 394,938.37/x
  3. Step 3: Cross multiply
    685,383.31x = 945,928.29 × 394,938.37
  4. Step 4: Simplify right side
    685,383.31x = 373,583,376,989.49
  5. Step 5: Solve for x
    x = 373,583,376,989.49/685,383.31
  6. Step 6: Final answer
    x = 545,072.18

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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.