Finding the Fourth Proportional to 212,413,811.20, 318,620,716.80 and 212,413,811.20
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Solution
The fourth proportional to 212,413,811.20, 318,620,716.80 and 212,413,811.20 is: 318,620,716.80
Step by Step Solution
- Step 1: Write the proportion equation
212,413,811.20 : 318,620,716.80 = 212,413,811.20 : x - Step 2: Convert to fraction form
212,413,811.20/318,620,716.80 = 212,413,811.20/x - Step 3: Cross multiply
212,413,811.20x = 318,620,716.80 × 212,413,811.20 - Step 4: Simplify right side
212,413,811.20x = 67,679,440,782,763,864 - Step 5: Solve for x
x = 67,679,440,782,763,864/212,413,811.20 - Step 6: Final answer
x = 318,620,716.80
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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.