Finding the Fourth Proportional to 738,145,420.40, 1,107,218,130.60 and 431,279,577.20
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Solution
The fourth proportional to 738,145,420.40, 1,107,218,130.60 and 431,279,577.20 is: 646,919,365.80
Step by Step Solution
- Step 1: Write the proportion equation
738,145,420.40 : 1,107,218,130.60 = 431,279,577.20 : x - Step 2: Convert to fraction form
738,145,420.40/1,107,218,130.60 = 431,279,577.20/x - Step 3: Cross multiply
738,145,420.40x = 1,107,218,130.60 × 431,279,577.20 - Step 4: Simplify right side
738,145,420.40x = 477,520,567,233,342,336 - Step 5: Solve for x
x = 477,520,567,233,342,336/738,145,420.40 - Step 6: Final answer
x = 646,919,365.80
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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.