Finding the Fourth Proportional to 1,328,608,260.70, 1,992,912,391.05 and 408,365,025.10
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Solution
The fourth proportional to 1,328,608,260.70, 1,992,912,391.05 and 408,365,025.10 is: 612,547,537.65
Step by Step Solution
- Step 1: Write the proportion equation
1,328,608,260.70 : 1,992,912,391.05 = 408,365,025.10 : x - Step 2: Convert to fraction form
1,328,608,260.70/1,992,912,391.05 = 408,365,025.10/x - Step 3: Cross multiply
1,328,608,260.70x = 1,992,912,391.05 × 408,365,025.10 - Step 4: Simplify right side
1,328,608,260.70x = 813,835,718,593,234,304 - Step 5: Solve for x
x = 813,835,718,593,234,304/1,328,608,260.70 - Step 6: Final answer
x = 612,547,537.65
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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.