Finding the Fourth Proportional to 858,107.20, 1,287,160.80 and 218,409.70
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Solution
The fourth proportional to 858,107.20, 1,287,160.80 and 218,409.70 is: 327,614.55
Step by Step Solution
- Step 1: Write the proportion equation
858,107.20 : 1,287,160.80 = 218,409.70 : x - Step 2: Convert to fraction form
858,107.20/1,287,160.80 = 218,409.70/x - Step 3: Cross multiply
858,107.20x = 1,287,160.80 × 218,409.70 - Step 4: Simplify right side
858,107.20x = 281,128,404,179.76 - Step 5: Solve for x
x = 281,128,404,179.76/858,107.20 - Step 6: Final answer
x = 327,614.55
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1.5x scale
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.