Finding the Fourth Proportional to 419,485,489.97, 629,253,456.93 and 128,355,135.01
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Solution
The fourth proportional to 419,485,489.97, 629,253,456.93 and 128,355,135.01 is: 192,540,419.99
Step by Step Solution
- Step 1: Write the proportion equation
419,485,489.97 : 629,253,456.93 = 128,355,135.01 : x - Step 2: Convert to fraction form
419,485,489.97/629,253,456.93 = 128,355,135.01/x - Step 3: Cross multiply
419,485,489.97x = 629,253,456.93 × 128,355,135.01 - Step 4: Simplify right side
419,485,489.97x = 80,767,912,416,613,088 - Step 5: Solve for x
x = 80,767,912,416,613,088/419,485,489.97 - Step 6: Final answer
x = 192,540,419.99
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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.