Finding the Fourth Proportional to 431,796,217.40, 647,694,326.10 and 423,186,873.20
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Solution
The fourth proportional to 431,796,217.40, 647,694,326.10 and 423,186,873.20 is: 634,780,309.80
Step by Step Solution
- Step 1: Write the proportion equation
431,796,217.40 : 647,694,326.10 = 423,186,873.20 : x - Step 2: Convert to fraction form
431,796,217.40/647,694,326.10 = 423,186,873.20/x - Step 3: Cross multiply
431,796,217.40x = 647,694,326.10 × 423,186,873.20 - Step 4: Simplify right side
431,796,217.40x = 274,095,736,651,640,160 - Step 5: Solve for x
x = 274,095,736,651,640,160/431,796,217.40 - Step 6: Final answer
x = 634,780,309.80
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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.