Finding the Fourth Proportional to 1,539,438,939.11, 2,124,508,222.64 and 861,215,431.07
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Solution
The fourth proportional to 1,539,438,939.11, 2,124,508,222.64 and 861,215,431.07 is: 1,188,523,440.78
Step by Step Solution
- Step 1: Write the proportion equation
1,539,438,939.11 : 2,124,508,222.64 = 861,215,431.07 : x - Step 2: Convert to fraction form
1,539,438,939.11/2,124,508,222.64 = 861,215,431.07/x - Step 3: Cross multiply
1,539,438,939.11x = 2,124,508,222.64 × 861,215,431.07 - Step 4: Simplify right side
1,539,438,939.11x = 1,829,659,264,780,131,328 - Step 5: Solve for x
x = 1,829,659,264,780,131,328/1,539,438,939.11 - Step 6: Final answer
x = 1,188,523,440.78
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.