Finding the Fourth Proportional to 2,172,860,812.28, 2,998,620,269.78 and 1,220,409,137.42
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Solution
The fourth proportional to 2,172,860,812.28, 2,998,620,269.78 and 1,220,409,137.42 is: 1,684,205,245.09
Step by Step Solution
- Step 1: Write the proportion equation
2,172,860,812.28 : 2,998,620,269.78 = 1,220,409,137.42 : x - Step 2: Convert to fraction form
2,172,860,812.28/2,998,620,269.78 = 1,220,409,137.42/x - Step 3: Cross multiply
2,172,860,812.28x = 2,998,620,269.78 × 1,220,409,137.42 - Step 4: Simplify right side
2,172,860,812.28x = 3,659,543,576,892,338,176 - Step 5: Solve for x
x = 3,659,543,576,892,338,176/2,172,860,812.28 - Step 6: Final answer
x = 1,684,205,245.09
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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.