Finding the Fourth Proportional to 1,327,661,457.80, 1,991,492,186.70 and 715,441,425.80
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Solution
The fourth proportional to 1,327,661,457.80, 1,991,492,186.70 and 715,441,425.80 is: 1,073,162,138.70
Step by Step Solution
- Step 1: Write the proportion equation
1,327,661,457.80 : 1,991,492,186.70 = 715,441,425.80 : x - Step 2: Convert to fraction form
1,327,661,457.80/1,991,492,186.70 = 715,441,425.80/x - Step 3: Cross multiply
1,327,661,457.80x = 1,991,492,186.70 × 715,441,425.80 - Step 4: Simplify right side
1,327,661,457.80x = 1,424,796,009,522,207,744 - Step 5: Solve for x
x = 1,424,796,009,522,207,744/1,327,661,457.80 - Step 6: Final answer
x = 1,073,162,138.70
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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.