Finding the Fourth Proportional to 1,243,350,728.40, 1,864,700,998.20 and 369,716,782.80
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Solution
The fourth proportional to 1,243,350,728.40, 1,864,700,998.20 and 369,716,782.80 is: 554,478,505.70
Step by Step Solution
- Step 1: Write the proportion equation
1,243,350,728.40 : 1,864,700,998.20 = 369,716,782.80 : x - Step 2: Convert to fraction form
1,243,350,728.40/1,864,700,998.20 = 369,716,782.80/x - Step 3: Cross multiply
1,243,350,728.40x = 1,864,700,998.20 × 369,716,782.80 - Step 4: Simplify right side
1,243,350,728.40x = 689,411,253,938,452,608 - Step 5: Solve for x
x = 689,411,253,938,452,608/1,243,350,728.40 - Step 6: Final answer
x = 554,478,505.70
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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.