Finding the Fourth Proportional to 1,260,784,912.80, 1,891,177,369.20 and 442,897,213.80
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Solution
The fourth proportional to 1,260,784,912.80, 1,891,177,369.20 and 442,897,213.80 is: 664,345,820.70
Step by Step Solution
- Step 1: Write the proportion equation
1,260,784,912.80 : 1,891,177,369.20 = 442,897,213.80 : x - Step 2: Convert to fraction form
1,260,784,912.80/1,891,177,369.20 = 442,897,213.80/x - Step 3: Cross multiply
1,260,784,912.80x = 1,891,177,369.20 × 442,897,213.80 - Step 4: Simplify right side
1,260,784,912.80x = 837,597,187,620,294,016 - Step 5: Solve for x
x = 837,597,187,620,294,016/1,260,784,912.80 - Step 6: Final answer
x = 664,345,820.70
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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.