Finding the Fourth Proportional to 711,457,276.68, 981,841,723.59 and 393,917,528.65
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Solution
The fourth proportional to 711,457,276.68, 981,841,723.59 and 393,917,528.65 is: 543,623,177.32
Step by Step Solution
- Step 1: Write the proportion equation
711,457,276.68 : 981,841,723.59 = 393,917,528.65 : x - Step 2: Convert to fraction form
711,457,276.68/981,841,723.59 = 393,917,528.65/x - Step 3: Cross multiply
711,457,276.68x = 981,841,723.59 × 393,917,528.65 - Step 4: Simplify right side
711,457,276.68x = 386,764,665,278,716,608 - Step 5: Solve for x
x = 386,764,665,278,716,608/711,457,276.68 - Step 6: Final answer
x = 543,623,177.32
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Double scale
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.