Finding the Fourth Proportional to 1,278,775,519.24, 1,764,709,507.38 and 721,863,375.88
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Solution
The fourth proportional to 1,278,775,519.24, 1,764,709,507.38 and 721,863,375.88 is: 996,171,058.39
Step by Step Solution
- Step 1: Write the proportion equation
1,278,775,519.24 : 1,764,709,507.38 = 721,863,375.88 : x - Step 2: Convert to fraction form
1,278,775,519.24/1,764,709,507.38 = 721,863,375.88/x - Step 3: Cross multiply
1,278,775,519.24x = 1,764,709,507.38 × 721,863,375.88 - Step 4: Simplify right side
1,278,775,519.24x = 1,273,879,162,444,858,624 - Step 5: Solve for x
x = 1,273,879,162,444,858,624/1,278,775,519.24 - Step 6: Final answer
x = 996,171,058.39
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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.