Finding the Fourth Proportional to 1,257,228,940.64, 1,886,135,205.86 and 428,189,765.68
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Solution
The fourth proportional to 1,257,228,940.64, 1,886,135,205.86 and 428,189,765.68 is: 642,384,028.66
Step by Step Solution
- Step 1: Write the proportion equation
1,257,228,940.64 : 1,886,135,205.86 = 428,189,765.68 : x - Step 2: Convert to fraction form
1,257,228,940.64/1,886,135,205.86 = 428,189,765.68/x - Step 3: Cross multiply
1,257,228,940.64x = 1,886,135,205.86 × 428,189,765.68 - Step 4: Simplify right side
1,257,228,940.64x = 807,623,791,837,991,936 - Step 5: Solve for x
x = 807,623,791,837,991,936/1,257,228,940.64 - Step 6: Final answer
x = 642,384,028.66
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.