Finding the Fourth Proportional to 2,628,331,403.40, 3,942,497,105.10 and 689,830,590.60
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Solution
The fourth proportional to 2,628,331,403.40, 3,942,497,105.10 and 689,830,590.60 is: 1,034,745,885.90
Step by Step Solution
- Step 1: Write the proportion equation
2,628,331,403.40 : 3,942,497,105.10 = 689,830,590.60 : x - Step 2: Convert to fraction form
2,628,331,403.40/3,942,497,105.10 = 689,830,590.60/x - Step 3: Cross multiply
2,628,331,403.40x = 3,942,497,105.10 × 689,830,590.60 - Step 4: Simplify right side
2,628,331,403.40x = 2,719,655,106,449,923,072 - Step 5: Solve for x
x = 2,719,655,106,449,923,072/2,628,331,403.40 - Step 6: Final answer
x = 1,034,745,885.90
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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.