Finding the Fourth Proportional to 1,279,482,625.81, 1,919,295,730.64 and 359,287,219.09
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Solution
The fourth proportional to 1,279,482,625.81, 1,919,295,730.64 and 359,287,219.09 is: 538,950,988.28
Step by Step Solution
- Step 1: Write the proportion equation
1,279,482,625.81 : 1,919,295,730.64 = 359,287,219.09 : x - Step 2: Convert to fraction form
1,279,482,625.81/1,919,295,730.64 = 359,287,219.09/x - Step 3: Cross multiply
1,279,482,625.81x = 1,919,295,730.64 × 359,287,219.09 - Step 4: Simplify right side
1,279,482,625.81x = 689,578,425,672,955,264 - Step 5: Solve for x
x = 689,578,425,672,955,264/1,279,482,625.81 - Step 6: Final answer
x = 538,950,988.28
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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.