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Finding the Fourth Proportional to 513,090.40, 768,469.20 and 263,480.80

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Solution

The fourth proportional to 513,090.40, 768,469.20 and 263,480.80 is: 394,622.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,090.40 : 768,469.20 = 263,480.80 : x
  2. Step 2: Convert to fraction form
    513,090.40/768,469.20 = 263,480.80/x
  3. Step 3: Cross multiply
    513,090.40x = 768,469.20 × 263,480.80
  4. Step 4: Simplify right side
    513,090.40x = 202,476,879,591.36
  5. Step 5: Solve for x
    x = 202,476,879,591.36/513,090.40
  6. Step 6: Final answer
    x = 394,622.23

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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.