Finding the Fourth Proportional to 305,612.49, 421,725.21 and 169,639.80
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Solution
The fourth proportional to 305,612.49, 421,725.21 and 169,639.80 is: 234,091.81
Step by Step Solution
- Step 1: Write the proportion equation
305,612.49 : 421,725.21 = 169,639.80 : x - Step 2: Convert to fraction form
305,612.49/421,725.21 = 169,639.80/x - Step 3: Cross multiply
305,612.49x = 421,725.21 × 169,639.80 - Step 4: Simplify right side
305,612.49x = 71,541,380,279.36 - Step 5: Solve for x
x = 71,541,380,279.36/305,612.49 - Step 6: Final answer
x = 234,091.81
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.