Finding the Fourth Proportional to 807,410,411.20, 1,211,115,616.80 and 663,921,341.20
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Solution
The fourth proportional to 807,410,411.20, 1,211,115,616.80 and 663,921,341.20 is: 995,882,011.80
Step by Step Solution
- Step 1: Write the proportion equation
807,410,411.20 : 1,211,115,616.80 = 663,921,341.20 : x - Step 2: Convert to fraction form
807,410,411.20/1,211,115,616.80 = 663,921,341.20/x - Step 3: Cross multiply
807,410,411.20x = 1,211,115,616.80 × 663,921,341.20 - Step 4: Simplify right side
807,410,411.20x = 804,085,504,654,121,216 - Step 5: Solve for x
x = 804,085,504,654,121,216/807,410,411.20 - Step 6: Final answer
x = 995,882,011.80
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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.