Finding the Fourth Proportional to 839,821,330.70, 1,259,731,996.05 and 664,469,420.30
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Solution
The fourth proportional to 839,821,330.70, 1,259,731,996.05 and 664,469,420.30 is: 996,704,130.45
Step by Step Solution
- Step 1: Write the proportion equation
839,821,330.70 : 1,259,731,996.05 = 664,469,420.30 : x - Step 2: Convert to fraction form
839,821,330.70/1,259,731,996.05 = 664,469,420.30/x - Step 3: Cross multiply
839,821,330.70x = 1,259,731,996.05 × 664,469,420.30 - Step 4: Simplify right side
839,821,330.70x = 837,053,389,148,705,280 - Step 5: Solve for x
x = 837,053,389,148,705,280/839,821,330.70 - Step 6: Final answer
x = 996,704,130.45
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Double scale
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Similar ratio
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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.