Finding the Fourth Proportional to 1,221,892,052.68, 1,686,215,399.70 and 664,981,775.56
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Solution
The fourth proportional to 1,221,892,052.68, 1,686,215,399.70 and 664,981,775.56 is: 917,677,226.90
Step by Step Solution
- Step 1: Write the proportion equation
1,221,892,052.68 : 1,686,215,399.70 = 664,981,775.56 : x - Step 2: Convert to fraction form
1,221,892,052.68/1,686,215,399.70 = 664,981,775.56/x - Step 3: Cross multiply
1,221,892,052.68x = 1,686,215,399.70 × 664,981,775.56 - Step 4: Simplify right side
1,221,892,052.68x = 1,121,302,510,469,121,024 - Step 5: Solve for x
x = 1,121,302,510,469,121,024/1,221,892,052.68 - Step 6: Final answer
x = 917,677,226.90
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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.