Finding the Fourth Proportional to 863,405,197.47, 1,190,419,369.16 and 720,556,617.15
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Solution
The fourth proportional to 863,405,197.47, 1,190,419,369.16 and 720,556,617.15 is: 993,466,979.52
Step by Step Solution
- Step 1: Write the proportion equation
863,405,197.47 : 1,190,419,369.16 = 720,556,617.15 : x - Step 2: Convert to fraction form
863,405,197.47/1,190,419,369.16 = 720,556,617.15/x - Step 3: Cross multiply
863,405,197.47x = 1,190,419,369.16 × 720,556,617.15 - Step 4: Simplify right side
863,405,197.47x = 857,764,553,628,163,840 - Step 5: Solve for x
x = 857,764,553,628,163,840/863,405,197.47 - Step 6: Final answer
x = 993,466,979.52
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.