Finding the Fourth Proportional to 1,278,498,769.41, 1,917,834,759.32 and 449,351,607.09
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Solution
The fourth proportional to 1,278,498,769.41, 1,917,834,759.32 and 449,351,607.09 is: 674,057,849.60
Step by Step Solution
- Step 1: Write the proportion equation
1,278,498,769.41 : 1,917,834,759.32 = 449,351,607.09 : x - Step 2: Convert to fraction form
1,278,498,769.41/1,917,834,759.32 = 449,351,607.09/x - Step 3: Cross multiply
1,278,498,769.41x = 1,917,834,759.32 × 449,351,607.09 - Step 4: Simplify right side
1,278,498,769.41x = 861,782,131,221,669,376 - Step 5: Solve for x
x = 861,782,131,221,669,376/1,278,498,769.41 - Step 6: Final answer
x = 674,057,849.60
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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.