Finding the Fourth Proportional to 311,801.74, 430,290.33 and 189,258.70
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Solution
The fourth proportional to 311,801.74, 430,290.33 and 189,258.70 is: 261,179.39
Step by Step Solution
- Step 1: Write the proportion equation
311,801.74 : 430,290.33 = 189,258.70 : x - Step 2: Convert to fraction form
311,801.74/430,290.33 = 189,258.70/x - Step 3: Cross multiply
311,801.74x = 430,290.33 × 189,258.70 - Step 4: Simplify right side
311,801.74x = 81,436,188,478.37 - Step 5: Solve for x
x = 81,436,188,478.37/311,801.74 - Step 6: Final answer
x = 261,179.39
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1.5x scale
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.