Finding the Fourth Proportional to 678,440.36, 936,138.60 and 391,998.44
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Solution
The fourth proportional to 678,440.36, 936,138.60 and 391,998.44 is: 540,894.81
Step by Step Solution
- Step 1: Write the proportion equation
678,440.36 : 936,138.60 = 391,998.44 : x - Step 2: Convert to fraction form
678,440.36/936,138.60 = 391,998.44/x - Step 3: Cross multiply
678,440.36x = 936,138.60 × 391,998.44 - Step 4: Simplify right side
678,440.36x = 366,964,870,823.78 - Step 5: Solve for x
x = 366,964,870,823.78/678,440.36 - Step 6: Final answer
x = 540,894.81
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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.