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Finding the Fourth Proportional to 1,311,613,679.87, 1,810,022,483.87 and 716,897,819.73

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Solution

The fourth proportional to 1,311,613,679.87, 1,810,022,483.87 and 716,897,819.73 is: 989,316,589.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,311,613,679.87 : 1,810,022,483.87 = 716,897,819.73 : x
  2. Step 2: Convert to fraction form
    1,311,613,679.87/1,810,022,483.87 = 716,897,819.73/x
  3. Step 3: Cross multiply
    1,311,613,679.87x = 1,810,022,483.87 × 716,897,819.73
  4. Step 4: Simplify right side
    1,311,613,679.87x = 1,297,601,172,345,097,728
  5. Step 5: Solve for x
    x = 1,297,601,172,345,097,728/1,311,613,679.87
  6. Step 6: Final answer
    x = 989,316,589.38

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Half scale
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Double scale
Find fourth proportional to 1,311,613,680.87, 1,810,022,485.25 and 716,897,820.73
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.