Finding the Fourth Proportional to 1,992,728,690.40, 2,990,793,646.80 and 889,032,021.60
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Solution
The fourth proportional to 1,992,728,690.40, 2,990,793,646.80 and 889,032,021.60 is: 1,334,306,739.70
Step by Step Solution
- Step 1: Write the proportion equation
1,992,728,690.40 : 2,990,793,646.80 = 889,032,021.60 : x - Step 2: Convert to fraction form
1,992,728,690.40/2,990,793,646.80 = 889,032,021.60/x - Step 3: Cross multiply
1,992,728,690.40x = 2,990,793,646.80 × 889,032,021.60 - Step 4: Simplify right side
1,992,728,690.40x = 2,658,911,322,003,040,768 - Step 5: Solve for x
x = 2,658,911,322,003,040,768/1,992,728,690.40 - Step 6: Final answer
x = 1,334,306,739.70
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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.