Finding the Fourth Proportional to 1,389,704,083.20, 2,084,556,124.80 and 469,567,135.80
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Solution
The fourth proportional to 1,389,704,083.20, 2,084,556,124.80 and 469,567,135.80 is: 704,350,703.70
Step by Step Solution
- Step 1: Write the proportion equation
1,389,704,083.20 : 2,084,556,124.80 = 469,567,135.80 : x - Step 2: Convert to fraction form
1,389,704,083.20/2,084,556,124.80 = 469,567,135.80/x - Step 3: Cross multiply
1,389,704,083.20x = 2,084,556,124.80 × 469,567,135.80 - Step 4: Simplify right side
1,389,704,083.20x = 978,839,048,936,683,392 - Step 5: Solve for x
x = 978,839,048,936,683,392/1,389,704,083.20 - Step 6: Final answer
x = 704,350,703.70
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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.