Finding the Fourth Proportional to 1,278,248,315.60, 1,915,677,486.84 and 656,438,427.92
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Solution
The fourth proportional to 1,278,248,315.60, 1,915,677,486.84 and 656,438,427.92 is: 983,787,189.48
Step by Step Solution
- Step 1: Write the proportion equation
1,278,248,315.60 : 1,915,677,486.84 = 656,438,427.92 : x - Step 2: Convert to fraction form
1,278,248,315.60/1,915,677,486.84 = 656,438,427.92/x - Step 3: Cross multiply
1,278,248,315.60x = 1,915,677,486.84 × 656,438,427.92 - Step 4: Simplify right side
1,278,248,315.60x = 1,257,524,317,862,985,984 - Step 5: Solve for x
x = 1,257,524,317,862,985,984/1,278,248,315.60 - Step 6: Final answer
x = 983,787,189.48
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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.