Home / 457,297.20-685,945.80-394,311.60

Finding the Fourth Proportional to 457,297.20, 685,945.80 and 394,311.60

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Solution

The fourth proportional to 457,297.20, 685,945.80 and 394,311.60 is: 591,467.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,297.20 : 685,945.80 = 394,311.60 : x
  2. Step 2: Convert to fraction form
    457,297.20/685,945.80 = 394,311.60/x
  3. Step 3: Cross multiply
    457,297.20x = 685,945.80 × 394,311.60
  4. Step 4: Simplify right side
    457,297.20x = 270,476,385,911.28
  5. Step 5: Solve for x
    x = 270,476,385,911.28/457,297.20
  6. Step 6: Final answer
    x = 591,467.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.