Finding the Fourth Proportional to 980,135,999.20, 1,470,203,998.80 and 633,211,314.40
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Solution
The fourth proportional to 980,135,999.20, 1,470,203,998.80 and 633,211,314.40 is: 949,816,971.60
Step by Step Solution
- Step 1: Write the proportion equation
980,135,999.20 : 1,470,203,998.80 = 633,211,314.40 : x - Step 2: Convert to fraction form
980,135,999.20/1,470,203,998.80 = 633,211,314.40/x - Step 3: Cross multiply
980,135,999.20x = 1,470,203,998.80 × 633,211,314.40 - Step 4: Simplify right side
980,135,999.20x = 930,949,806,516,283,904 - Step 5: Solve for x
x = 930,949,806,516,283,904/980,135,999.20 - Step 6: Final answer
x = 949,816,971.60
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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.