Finding the Fourth Proportional to 1,225,863,985.97, 1,691,728,026.89 and 668,982,902.87
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Solution
The fourth proportional to 1,225,863,985.97, 1,691,728,026.89 and 668,982,902.87 is: 923,215,902.62
Step by Step Solution
- Step 1: Write the proportion equation
1,225,863,985.97 : 1,691,728,026.89 = 668,982,902.87 : x - Step 2: Convert to fraction form
1,225,863,985.97/1,691,728,026.89 = 668,982,902.87/x - Step 3: Cross multiply
1,225,863,985.97x = 1,691,728,026.89 × 668,982,902.87 - Step 4: Simplify right side
1,225,863,985.97x = 1,131,737,126,301,311,232 - Step 5: Solve for x
x = 1,131,737,126,301,311,232/1,225,863,985.97 - Step 6: Final answer
x = 923,215,902.62
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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.