Finding the Fourth Proportional to 720,465,260.70, 994,242,910.07 and 390,440,399.70
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Solution
The fourth proportional to 720,465,260.70, 994,242,910.07 and 390,440,399.70 is: 538,808,212.39
Step by Step Solution
- Step 1: Write the proportion equation
720,465,260.70 : 994,242,910.07 = 390,440,399.70 : x - Step 2: Convert to fraction form
720,465,260.70/994,242,910.07 = 390,440,399.70/x - Step 3: Cross multiply
720,465,260.70x = 994,242,910.07 × 390,440,399.70 - Step 4: Simplify right side
720,465,260.70x = 388,192,599,204,669,760 - Step 5: Solve for x
x = 388,192,599,204,669,760/720,465,260.70 - Step 6: Final answer
x = 538,808,212.39
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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.