Finding the Fourth Proportional to 1,640,220,413.70, 2,460,330,620.55 and 491,363,069.70
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Solution
The fourth proportional to 1,640,220,413.70, 2,460,330,620.55 and 491,363,069.70 is: 737,044,604.55
Step by Step Solution
- Step 1: Write the proportion equation
1,640,220,413.70 : 2,460,330,620.55 = 491,363,069.70 : x - Step 2: Convert to fraction form
1,640,220,413.70/2,460,330,620.55 = 491,363,069.70/x - Step 3: Cross multiply
1,640,220,413.70x = 2,460,330,620.55 × 491,363,069.70 - Step 4: Simplify right side
1,640,220,413.70x = 1,208,915,606,190,353,920 - Step 5: Solve for x
x = 1,208,915,606,190,353,920/1,640,220,413.70 - Step 6: Final answer
x = 737,044,604.55
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Double scale
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Similar ratio
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1.5x scale
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.