Finding the Fourth Proportional to 1,328,494,391.12, 1,992,931,770.36 and 408,447,989.84
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Solution
The fourth proportional to 1,328,494,391.12, 1,992,931,770.36 and 408,447,989.84 is: 612,730,457.07
Step by Step Solution
- Step 1: Write the proportion equation
1,328,494,391.12 : 1,992,931,770.36 = 408,447,989.84 : x - Step 2: Convert to fraction form
1,328,494,391.12/1,992,931,770.36 = 408,447,989.84/x - Step 3: Cross multiply
1,328,494,391.12x = 1,992,931,770.36 × 408,447,989.84 - Step 4: Simplify right side
1,328,494,391.12x = 814,008,975,491,814,400 - Step 5: Solve for x
x = 814,008,975,491,814,400/1,328,494,391.12 - Step 6: Final answer
x = 612,730,457.07
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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.