Finding the Fourth Proportional to 1,380,444,122.31, 1,905,059,897.85 and 816,412,502.99
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Solution
The fourth proportional to 1,380,444,122.31, 1,905,059,897.85 and 816,412,502.99 is: 1,126,677,055.89
Step by Step Solution
- Step 1: Write the proportion equation
1,380,444,122.31 : 1,905,059,897.85 = 816,412,502.99 : x - Step 2: Convert to fraction form
1,380,444,122.31/1,905,059,897.85 = 816,412,502.99/x - Step 3: Cross multiply
1,380,444,122.31x = 1,905,059,897.85 × 816,412,502.99 - Step 4: Simplify right side
1,380,444,122.31x = 1,555,314,719,540,066,816 - Step 5: Solve for x
x = 1,555,314,719,540,066,816/1,380,444,122.31 - Step 6: Final answer
x = 1,126,677,055.89
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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.