Finding the Fourth Proportional to 839,821,330.20, 1,259,731,995.30 and 664,469,419.80
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Solution
The fourth proportional to 839,821,330.20, 1,259,731,995.30 and 664,469,419.80 is: 996,704,129.70
Step by Step Solution
- Step 1: Write the proportion equation
839,821,330.20 : 1,259,731,995.30 = 664,469,419.80 : x - Step 2: Convert to fraction form
839,821,330.20/1,259,731,995.30 = 664,469,419.80/x - Step 3: Cross multiply
839,821,330.20x = 1,259,731,995.30 × 664,469,419.80 - Step 4: Simplify right side
839,821,330.20x = 837,053,388,020,487,296 - Step 5: Solve for x
x = 837,053,388,020,487,296/839,821,330.20 - Step 6: Final answer
x = 996,704,129.70
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Double scale
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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.