Home / 1,212,940,129.20-1,819,410,193.80-395,052,430.20

Finding the Fourth Proportional to 1,212,940,129.20, 1,819,410,193.80 and 395,052,430.20

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Solution

The fourth proportional to 1,212,940,129.20, 1,819,410,193.80 and 395,052,430.20 is: 592,578,645.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212,940,129.20 : 1,819,410,193.80 = 395,052,430.20 : x
  2. Step 2: Convert to fraction form
    1,212,940,129.20/1,819,410,193.80 = 395,052,430.20/x
  3. Step 3: Cross multiply
    1,212,940,129.20x = 1,819,410,193.80 × 395,052,430.20
  4. Step 4: Simplify right side
    1,212,940,129.20x = 718,762,418,591,342,976
  5. Step 5: Solve for x
    x = 718,762,418,591,342,976/1,212,940,129.20
  6. Step 6: Final answer
    x = 592,578,645.30

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Double scale
Find fourth proportional to 1,212,940,130.20, 1,819,410,195.30 and 395,052,431.20
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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.