Finding the Fourth Proportional to 1,328,608,266.70, 1,992,912,400.05 and 408,365,031.10
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Solution
The fourth proportional to 1,328,608,266.70, 1,992,912,400.05 and 408,365,031.10 is: 612,547,546.65
Step by Step Solution
- Step 1: Write the proportion equation
1,328,608,266.70 : 1,992,912,400.05 = 408,365,031.10 : x - Step 2: Convert to fraction form
1,328,608,266.70/1,992,912,400.05 = 408,365,031.10/x - Step 3: Cross multiply
1,328,608,266.70x = 1,992,912,400.05 × 408,365,031.10 - Step 4: Simplify right side
1,328,608,266.70x = 813,835,734,225,993,856 - Step 5: Solve for x
x = 813,835,734,225,993,856/1,328,608,266.70 - Step 6: Final answer
x = 612,547,546.65
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Similar ratio
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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.