Finding the Fourth Proportional to 663,669,821.80, 995,504,732.70 and 621,202,493.80
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Solution
The fourth proportional to 663,669,821.80, 995,504,732.70 and 621,202,493.80 is: 931,803,740.70
Step by Step Solution
- Step 1: Write the proportion equation
663,669,821.80 : 995,504,732.70 = 621,202,493.80 : x - Step 2: Convert to fraction form
663,669,821.80/995,504,732.70 = 621,202,493.80/x - Step 3: Cross multiply
663,669,821.80x = 995,504,732.70 × 621,202,493.80 - Step 4: Simplify right side
663,669,821.80x = 618,410,022,542,942,336 - Step 5: Solve for x
x = 618,410,022,542,942,336/663,669,821.80 - Step 6: Final answer
x = 931,803,740.70
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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.