Finding the Fourth Proportional to 1,287,647,577.60, 1,931,471,366.40 and 318,299,193.60
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Solution
The fourth proportional to 1,287,647,577.60, 1,931,471,366.40 and 318,299,193.60 is: 477,448,790.40
Step by Step Solution
- Step 1: Write the proportion equation
1,287,647,577.60 : 1,931,471,366.40 = 318,299,193.60 : x - Step 2: Convert to fraction form
1,287,647,577.60/1,931,471,366.40 = 318,299,193.60/x - Step 3: Cross multiply
1,287,647,577.60x = 1,931,471,366.40 × 318,299,193.60 - Step 4: Simplify right side
1,287,647,577.60x = 614,785,778,386,610,176 - Step 5: Solve for x
x = 614,785,778,386,610,176/1,287,647,577.60 - Step 6: Final answer
x = 477,448,790.40
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Double scale
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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.