Finding the Fourth Proportional to 2,989,368,521.20, 4,484,052,781.80 and 918,821,241.10
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Solution
The fourth proportional to 2,989,368,521.20, 4,484,052,781.80 and 918,821,241.10 is: 1,378,231,861.65
Step by Step Solution
- Step 1: Write the proportion equation
2,989,368,521.20 : 4,484,052,781.80 = 918,821,241.10 : x - Step 2: Convert to fraction form
2,989,368,521.20/4,484,052,781.80 = 918,821,241.10/x - Step 3: Cross multiply
2,989,368,521.20x = 4,484,052,781.80 × 918,821,241.10 - Step 4: Simplify right side
2,989,368,521.20x = 4,120,042,942,131,383,808 - Step 5: Solve for x
x = 4,120,042,942,131,383,808/2,989,368,521.20 - Step 6: Final answer
x = 1,378,231,861.65
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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.