Finding the Fourth Proportional to 3,981,192,427.20, 5,971,565,430 and 1,220,813,865.12
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Solution
The fourth proportional to 3,981,192,427.20, 5,971,565,430 and 1,220,813,865.12 is: 1,831,152,351.14
Step by Step Solution
- Step 1: Write the proportion equation
3,981,192,427.20 : 5,971,565,430 = 1,220,813,865.12 : x - Step 2: Convert to fraction form
3,981,192,427.20/5,971,565,430 = 1,220,813,865.12/x - Step 3: Cross multiply
3,981,192,427.20x = 5,971,565,430 × 1,220,813,865.12 - Step 4: Simplify right side
3,981,192,427.20x = 7,290,169,873,415,274,496 - Step 5: Solve for x
x = 7,290,169,873,415,274,496/3,981,192,427.20 - Step 6: Final answer
x = 1,831,152,351.14
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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.