Finding the Fourth Proportional to 258,413.78, 387,620.68 and 80,934.68
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Solution
The fourth proportional to 258,413.78, 387,620.68 and 80,934.68 is: 121,402.02
Step by Step Solution
- Step 1: Write the proportion equation
258,413.78 : 387,620.68 = 80,934.68 : x - Step 2: Convert to fraction form
258,413.78/387,620.68 = 80,934.68/x - Step 3: Cross multiply
258,413.78x = 387,620.68 × 80,934.68 - Step 4: Simplify right side
258,413.78x = 31,371,956,463.90 - Step 5: Solve for x
x = 31,371,956,463.90/258,413.78 - Step 6: Final answer
x = 121,402.02
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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.