Finding the Fourth Proportional to 378,990,975.20, 568,486,462.80 and 91,776,639.20
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Solution
The fourth proportional to 378,990,975.20, 568,486,462.80 and 91,776,639.20 is: 137,664,958.80
Step by Step Solution
- Step 1: Write the proportion equation
378,990,975.20 : 568,486,462.80 = 91,776,639.20 : x - Step 2: Convert to fraction form
378,990,975.20/568,486,462.80 = 91,776,639.20/x - Step 3: Cross multiply
378,990,975.20x = 568,486,462.80 × 91,776,639.20 - Step 4: Simplify right side
378,990,975.20x = 52,173,776,986,479,816 - Step 5: Solve for x
x = 52,173,776,986,479,816/378,990,975.20 - Step 6: Final answer
x = 137,664,958.80
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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.