Home / 1,280,860.20-1,921,290.30-394,396.20

Finding the Fourth Proportional to 1,280,860.20, 1,921,290.30 and 394,396.20

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Solution

The fourth proportional to 1,280,860.20, 1,921,290.30 and 394,396.20 is: 591,594.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280,860.20 : 1,921,290.30 = 394,396.20 : x
  2. Step 2: Convert to fraction form
    1,280,860.20/1,921,290.30 = 394,396.20/x
  3. Step 3: Cross multiply
    1,280,860.20x = 1,921,290.30 × 394,396.20
  4. Step 4: Simplify right side
    1,280,860.20x = 757,749,593,416.86
  5. Step 5: Solve for x
    x = 757,749,593,416.86/1,280,860.20
  6. Step 6: Final answer
    x = 591,594.30

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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.