Finding the Fourth Proportional to 1,278,498,765.40, 1,917,834,753.31 and 449,351,603.08
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Solution
The fourth proportional to 1,278,498,765.40, 1,917,834,753.31 and 449,351,603.08 is: 674,057,843.59
Step by Step Solution
- Step 1: Write the proportion equation
1,278,498,765.40 : 1,917,834,753.31 = 449,351,603.08 : x - Step 2: Convert to fraction form
1,278,498,765.40/1,917,834,753.31 = 449,351,603.08/x - Step 3: Cross multiply
1,278,498,765.40x = 1,917,834,753.31 × 449,351,603.08 - Step 4: Simplify right side
1,278,498,765.40x = 861,782,120,836,466,816 - Step 5: Solve for x
x = 861,782,120,836,466,816/1,278,498,765.40 - Step 6: Final answer
x = 674,057,843.59
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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.