Finding the Fourth Proportional to 1,212,940,132.20, 1,819,410,198.30 and 395,052,433.20
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Solution
The fourth proportional to 1,212,940,132.20, 1,819,410,198.30 and 395,052,433.20 is: 592,578,649.80
Step by Step Solution
- Step 1: Write the proportion equation
1,212,940,132.20 : 1,819,410,198.30 = 395,052,433.20 : x - Step 2: Convert to fraction form
1,212,940,132.20/1,819,410,198.30 = 395,052,433.20/x - Step 3: Cross multiply
1,212,940,132.20x = 1,819,410,198.30 × 395,052,433.20 - Step 4: Simplify right side
1,212,940,132.20x = 718,762,425,827,309,440 - Step 5: Solve for x
x = 718,762,425,827,309,440/1,212,940,132.20 - Step 6: Final answer
x = 592,578,649.80
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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.