Finding the Fourth Proportional to 1,328,879,805.20, 1,993,319,707.80 and 638,620,614.80
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Solution
The fourth proportional to 1,328,879,805.20, 1,993,319,707.80 and 638,620,614.80 is: 957,930,922.20
Step by Step Solution
- Step 1: Write the proportion equation
1,328,879,805.20 : 1,993,319,707.80 = 638,620,614.80 : x - Step 2: Convert to fraction form
1,328,879,805.20/1,993,319,707.80 = 638,620,614.80/x - Step 3: Cross multiply
1,328,879,805.20x = 1,993,319,707.80 × 638,620,614.80 - Step 4: Simplify right side
1,328,879,805.20x = 1,272,975,057,288,192,256 - Step 5: Solve for x
x = 1,272,975,057,288,192,256/1,328,879,805.20 - Step 6: Final answer
x = 957,930,922.20
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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.