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Finding the Fourth Proportional to 1,305,659,200.80, 1,958,488,801.20 and 917,919,847.20

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Solution

The fourth proportional to 1,305,659,200.80, 1,958,488,801.20 and 917,919,847.20 is: 1,376,879,770.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,305,659,200.80 : 1,958,488,801.20 = 917,919,847.20 : x
  2. Step 2: Convert to fraction form
    1,305,659,200.80/1,958,488,801.20 = 917,919,847.20/x
  3. Step 3: Cross multiply
    1,305,659,200.80x = 1,958,488,801.20 × 917,919,847.20
  4. Step 4: Simplify right side
    1,305,659,200.80x = 1,797,735,741,140,415,232
  5. Step 5: Solve for x
    x = 1,797,735,741,140,415,232/1,305,659,200.80
  6. Step 6: Final answer
    x = 1,376,879,770.80

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Double scale
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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.