Finding the Fourth Proportional to 421,413.75, 632,121.26 and 172,095.75
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Solution
The fourth proportional to 421,413.75, 632,121.26 and 172,095.75 is: 258,143.88
Step by Step Solution
- Step 1: Write the proportion equation
421,413.75 : 632,121.26 = 172,095.75 : x - Step 2: Convert to fraction form
421,413.75/632,121.26 = 172,095.75/x - Step 3: Cross multiply
421,413.75x = 632,121.26 × 172,095.75 - Step 4: Simplify right side
421,413.75x = 108,785,381,470.17 - Step 5: Solve for x
x = 108,785,381,470.17/421,413.75 - Step 6: Final answer
x = 258,143.88
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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.