Finding the Fourth Proportional to 990,783,927.60, 1,486,175,891.40 and 664,266,577.20
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Solution
The fourth proportional to 990,783,927.60, 1,486,175,891.40 and 664,266,577.20 is: 996,399,865.80
Step by Step Solution
- Step 1: Write the proportion equation
990,783,927.60 : 1,486,175,891.40 = 664,266,577.20 : x - Step 2: Convert to fraction form
990,783,927.60/1,486,175,891.40 = 664,266,577.20/x - Step 3: Cross multiply
990,783,927.60x = 1,486,175,891.40 × 664,266,577.20 - Step 4: Simplify right side
990,783,927.60x = 987,216,972,497,437,056 - Step 5: Solve for x
x = 987,216,972,497,437,056/990,783,927.60 - Step 6: Final answer
x = 996,399,865.80
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1.5x scale
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.