Finding the Fourth Proportional to 638,810,108.70, 958,215,163.05 and 420,706,722.30
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Solution
The fourth proportional to 638,810,108.70, 958,215,163.05 and 420,706,722.30 is: 631,060,083.45
Step by Step Solution
- Step 1: Write the proportion equation
638,810,108.70 : 958,215,163.05 = 420,706,722.30 : x - Step 2: Convert to fraction form
638,810,108.70/958,215,163.05 = 420,706,722.30/x - Step 3: Cross multiply
638,810,108.70x = 958,215,163.05 × 420,706,722.30 - Step 4: Simplify right side
638,810,108.70x = 403,127,560,504,925,568 - Step 5: Solve for x
x = 403,127,560,504,925,568/638,810,108.70 - Step 6: Final answer
x = 631,060,083.45
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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.