Home / 1,086,400,819.80-1,629,601,229.70-396,330,586.20

Finding the Fourth Proportional to 1,086,400,819.80, 1,629,601,229.70 and 396,330,586.20

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Solution

The fourth proportional to 1,086,400,819.80, 1,629,601,229.70 and 396,330,586.20 is: 594,495,879.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,086,400,819.80 : 1,629,601,229.70 = 396,330,586.20 : x
  2. Step 2: Convert to fraction form
    1,086,400,819.80/1,629,601,229.70 = 396,330,586.20/x
  3. Step 3: Cross multiply
    1,086,400,819.80x = 1,629,601,229.70 × 396,330,586.20
  4. Step 4: Simplify right side
    1,086,400,819.80x = 645,860,810,639,241,856
  5. Step 5: Solve for x
    x = 645,860,810,639,241,856/1,086,400,819.80
  6. Step 6: Final answer
    x = 594,495,879.30

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Half scale
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Double scale
Find fourth proportional to 1,086,400,820.80, 1,629,601,231.20 and 396,330,587.20
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.