Finding the Fourth Proportional to 711,516,220.80, 981,882,202.68 and 393,946,039.68
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Solution
The fourth proportional to 711,516,220.80, 981,882,202.68 and 393,946,039.68 is: 543,639,897.26
Step by Step Solution
- Step 1: Write the proportion equation
711,516,220.80 : 981,882,202.68 = 393,946,039.68 : x - Step 2: Convert to fraction form
711,516,220.80/981,882,202.68 = 393,946,039.68/x - Step 3: Cross multiply
711,516,220.80x = 981,882,202.68 × 393,946,039.68 - Step 4: Simplify right side
711,516,220.80x = 386,808,605,178,061,056 - Step 5: Solve for x
x = 386,808,605,178,061,056/711,516,220.80 - Step 6: Final answer
x = 543,639,897.26
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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.