Finding the Fourth Proportional to 1,279,411,627.75, 1,919,117,441.63 and 310,063,243.75
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Solution
The fourth proportional to 1,279,411,627.75, 1,919,117,441.63 and 310,063,243.75 is: 465,094,865.63
Step by Step Solution
- Step 1: Write the proportion equation
1,279,411,627.75 : 1,919,117,441.63 = 310,063,243.75 : x - Step 2: Convert to fraction form
1,279,411,627.75/1,919,117,441.63 = 310,063,243.75/x - Step 3: Cross multiply
1,279,411,627.75x = 1,919,117,441.63 × 310,063,243.75 - Step 4: Simplify right side
1,279,411,627.75x = 595,047,779,088,999,168 - Step 5: Solve for x
x = 595,047,779,088,999,168/1,279,411,627.75 - Step 6: Final answer
x = 465,094,865.63
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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.