Finding the Fourth Proportional to 651,268,138.40, 976,902,207.60 and 646,733,175.20
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Solution
The fourth proportional to 651,268,138.40, 976,902,207.60 and 646,733,175.20 is: 970,099,762.80
Step by Step Solution
- Step 1: Write the proportion equation
651,268,138.40 : 976,902,207.60 = 646,733,175.20 : x - Step 2: Convert to fraction form
651,268,138.40/976,902,207.60 = 646,733,175.20/x - Step 3: Cross multiply
651,268,138.40x = 976,902,207.60 × 646,733,175.20 - Step 4: Simplify right side
651,268,138.40x = 631,795,066,581,037,696 - Step 5: Solve for x
x = 631,795,066,581,037,696/651,268,138.40 - Step 6: Final answer
x = 970,099,762.80
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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.