Finding the Fourth Proportional to 1,276,963,921.44, 1,762,060,467.60 and 720,013,779.36
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Solution
The fourth proportional to 1,276,963,921.44, 1,762,060,467.60 and 720,013,779.36 is: 993,534,582.64
Step by Step Solution
- Step 1: Write the proportion equation
1,276,963,921.44 : 1,762,060,467.60 = 720,013,779.36 : x - Step 2: Convert to fraction form
1,276,963,921.44/1,762,060,467.60 = 720,013,779.36/x - Step 3: Cross multiply
1,276,963,921.44x = 1,762,060,467.60 × 720,013,779.36 - Step 4: Simplify right side
1,276,963,921.44x = 1,268,707,816,737,524,736 - Step 5: Solve for x
x = 1,268,707,816,737,524,736/1,276,963,921.44 - Step 6: Final answer
x = 993,534,582.64
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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.