Finding the Fourth Proportional to 427,309,020.20, 640,963,530.30 and 279,355,845.80
Calculator
Solution
The fourth proportional to 427,309,020.20, 640,963,530.30 and 279,355,845.80 is: 419,033,768.70
Step by Step Solution
- Step 1: Write the proportion equation
427,309,020.20 : 640,963,530.30 = 279,355,845.80 : x - Step 2: Convert to fraction form
427,309,020.20/640,963,530.30 = 279,355,845.80/x - Step 3: Cross multiply
427,309,020.20x = 640,963,530.30 × 279,355,845.80 - Step 4: Simplify right side
427,309,020.20x = 179,056,909,133,910,432 - Step 5: Solve for x
x = 179,056,909,133,910,432/427,309,020.20 - Step 6: Final answer
x = 419,033,768.70
Related Problems
Find fourth proportional to 213,654,510.10, 320,481,765.15 and 139,677,922.90
Half scale
Find fourth proportional to 854,618,040.40, 1,281,927,060.60 and 558,711,691.60
Double scale
Find fourth proportional to 427,309,021.20, 640,963,531.80 and 279,355,846.80
Similar ratio
Find fourth proportional to 640,963,530.30, 961,445,295.45 and 419,033,768.70
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.