Finding the Fourth Proportional to 402,493.12, 555,413.68 and 221,201.28
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Solution
The fourth proportional to 402,493.12, 555,413.68 and 221,201.28 is: 305,243.02
Step by Step Solution
- Step 1: Write the proportion equation
402,493.12 : 555,413.68 = 221,201.28 : x - Step 2: Convert to fraction form
402,493.12/555,413.68 = 221,201.28/x - Step 3: Cross multiply
402,493.12x = 555,413.68 × 221,201.28 - Step 4: Simplify right side
402,493.12x = 122,858,216,945.51 - Step 5: Solve for x
x = 122,858,216,945.51/402,493.12 - Step 6: Final answer
x = 305,243.02
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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.