Home / 1,290,816,189.60-1,936,224,284.40-321,467,805.60

Finding the Fourth Proportional to 1,290,816,189.60, 1,936,224,284.40 and 321,467,805.60

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Solution

The fourth proportional to 1,290,816,189.60, 1,936,224,284.40 and 321,467,805.60 is: 482,201,708.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,816,189.60 : 1,936,224,284.40 = 321,467,805.60 : x
  2. Step 2: Convert to fraction form
    1,290,816,189.60/1,936,224,284.40 = 321,467,805.60/x
  3. Step 3: Cross multiply
    1,290,816,189.60x = 1,936,224,284.40 × 321,467,805.60
  4. Step 4: Simplify right side
    1,290,816,189.60x = 622,433,771,855,498,368
  5. Step 5: Solve for x
    x = 622,433,771,855,498,368/1,290,816,189.60
  6. Step 6: Final answer
    x = 482,201,708.40

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Half scale
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Double scale
Find fourth proportional to 1,290,816,190.60, 1,936,224,285.90 and 321,467,806.60
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.