Finding the Fourth Proportional to 290,948,109.20, 436,422,163.80 and 259,380,513.80
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Solution
The fourth proportional to 290,948,109.20, 436,422,163.80 and 259,380,513.80 is: 389,070,770.70
Step by Step Solution
- Step 1: Write the proportion equation
290,948,109.20 : 436,422,163.80 = 259,380,513.80 : x - Step 2: Convert to fraction form
290,948,109.20/436,422,163.80 = 259,380,513.80/x - Step 3: Cross multiply
290,948,109.20x = 436,422,163.80 × 259,380,513.80 - Step 4: Simplify right side
290,948,109.20x = 113,199,405,080,151,776 - Step 5: Solve for x
x = 113,199,405,080,151,776/290,948,109.20 - Step 6: Final answer
x = 389,070,770.70
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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.