Finding the Fourth Proportional to 664,431,999.80, 996,647,999.70 and 392,334,207.80
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Solution
The fourth proportional to 664,431,999.80, 996,647,999.70 and 392,334,207.80 is: 588,501,311.70
Step by Step Solution
- Step 1: Write the proportion equation
664,431,999.80 : 996,647,999.70 = 392,334,207.80 : x - Step 2: Convert to fraction form
664,431,999.80/996,647,999.70 = 392,334,207.80/x - Step 3: Cross multiply
664,431,999.80x = 996,647,999.70 × 392,334,207.80 - Step 4: Simplify right side
664,431,999.80x = 391,019,103,417,754,176 - Step 5: Solve for x
x = 391,019,103,417,754,176/664,431,999.80 - Step 6: Final answer
x = 588,501,311.70
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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.