Home / 685,121.56-945,388.87-394,775.44

Finding the Fourth Proportional to 685,121.56, 945,388.87 and 394,775.44

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Solution

The fourth proportional to 685,121.56, 945,388.87 and 394,775.44 is: 544,744.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,121.56 : 945,388.87 = 394,775.44 : x
  2. Step 2: Convert to fraction form
    685,121.56/945,388.87 = 394,775.44/x
  3. Step 3: Cross multiply
    685,121.56x = 945,388.87 × 394,775.44
  4. Step 4: Simplify right side
    685,121.56x = 373,216,307,125.35
  5. Step 5: Solve for x
    x = 373,216,307,125.35/685,121.56
  6. Step 6: Final answer
    x = 544,744.65

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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.