Finding the Fourth Proportional to 821,640.20, 1,232,460.30 and 289,761.80
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Solution
The fourth proportional to 821,640.20, 1,232,460.30 and 289,761.80 is: 434,642.70
Step by Step Solution
- Step 1: Write the proportion equation
821,640.20 : 1,232,460.30 = 289,761.80 : x - Step 2: Convert to fraction form
821,640.20/1,232,460.30 = 289,761.80/x - Step 3: Cross multiply
821,640.20x = 1,232,460.30 × 289,761.80 - Step 4: Simplify right side
821,640.20x = 357,119,914,956.54 - Step 5: Solve for x
x = 357,119,914,956.54/821,640.20 - Step 6: Final answer
x = 434,642.70
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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.