Finding the Fourth Proportional to 1,420,207,434.80, 2,128,967,459.40 and 838,388,452.40
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Solution
The fourth proportional to 1,420,207,434.80, 2,128,967,459.40 and 838,388,452.40 is: 1,256,789,458.89
Step by Step Solution
- Step 1: Write the proportion equation
1,420,207,434.80 : 2,128,967,459.40 = 838,388,452.40 : x - Step 2: Convert to fraction form
1,420,207,434.80/2,128,967,459.40 = 838,388,452.40/x - Step 3: Cross multiply
1,420,207,434.80x = 2,128,967,459.40 × 838,388,452.40 - Step 4: Simplify right side
1,420,207,434.80x = 1,784,901,733,496,325,888 - Step 5: Solve for x
x = 1,784,901,733,496,325,888/1,420,207,434.80 - Step 6: Final answer
x = 1,256,789,458.89
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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.