Finding the Fourth Proportional to 1,278,775,520.24, 1,764,709,508.76 and 721,863,376.88
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Solution
The fourth proportional to 1,278,775,520.24, 1,764,709,508.76 and 721,863,376.88 is: 996,171,059.77
Step by Step Solution
- Step 1: Write the proportion equation
1,278,775,520.24 : 1,764,709,508.76 = 721,863,376.88 : x - Step 2: Convert to fraction form
1,278,775,520.24/1,764,709,508.76 = 721,863,376.88/x - Step 3: Cross multiply
1,278,775,520.24x = 1,764,709,508.76 × 721,863,376.88 - Step 4: Simplify right side
1,278,775,520.24x = 1,273,879,165,205,739,520 - Step 5: Solve for x
x = 1,273,879,165,205,739,520/1,278,775,520.24 - Step 6: Final answer
x = 996,171,059.77
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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.