Finding the Fourth Proportional to 1,279,526,503.68, 1,919,289,755.52 and 310,178,119.68
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Solution
The fourth proportional to 1,279,526,503.68, 1,919,289,755.52 and 310,178,119.68 is: 465,267,179.52
Step by Step Solution
- Step 1: Write the proportion equation
1,279,526,503.68 : 1,919,289,755.52 = 310,178,119.68 : x - Step 2: Convert to fraction form
1,279,526,503.68/1,919,289,755.52 = 310,178,119.68/x - Step 3: Cross multiply
1,279,526,503.68x = 1,919,289,755.52 × 310,178,119.68 - Step 4: Simplify right side
1,279,526,503.68x = 595,321,687,488,280,448 - Step 5: Solve for x
x = 595,321,687,488,280,448/1,279,526,503.68 - Step 6: Final answer
x = 465,267,179.52
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Double scale
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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.