Finding the Fourth Proportional to 665,981,610.40, 998,972,415.60 and 655,777,943.20
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Solution
The fourth proportional to 665,981,610.40, 998,972,415.60 and 655,777,943.20 is: 983,666,914.80
Step by Step Solution
- Step 1: Write the proportion equation
665,981,610.40 : 998,972,415.60 = 655,777,943.20 : x - Step 2: Convert to fraction form
665,981,610.40/998,972,415.60 = 655,777,943.20/x - Step 3: Cross multiply
665,981,610.40x = 998,972,415.60 × 655,777,943.20 - Step 4: Simplify right side
665,981,610.40x = 655,104,076,015,703,680 - Step 5: Solve for x
x = 655,104,076,015,703,680/665,981,610.40 - Step 6: Final answer
x = 983,666,914.80
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Double scale
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Similar ratio
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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.