Home / 854,786.80-1,282,180.20-412,418.80

Finding the Fourth Proportional to 854,786.80, 1,282,180.20 and 412,418.80

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Solution

The fourth proportional to 854,786.80, 1,282,180.20 and 412,418.80 is: 618,628.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    854,786.80 : 1,282,180.20 = 412,418.80 : x
  2. Step 2: Convert to fraction form
    854,786.80/1,282,180.20 = 412,418.80/x
  3. Step 3: Cross multiply
    854,786.80x = 1,282,180.20 × 412,418.80
  4. Step 4: Simplify right side
    854,786.80x = 528,795,219,467.76
  5. Step 5: Solve for x
    x = 528,795,219,467.76/854,786.80
  6. Step 6: Final answer
    x = 618,628.20

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Double scale
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Similar ratio
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1.5x scale

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.