Finding the Fourth Proportional to 685,087,906.97, 945,430,381.55 and 371,825,876.09
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Solution
The fourth proportional to 685,087,906.97, 945,430,381.55 and 371,825,876.09 is: 513,124,631.63
Step by Step Solution
- Step 1: Write the proportion equation
685,087,906.97 : 945,430,381.55 = 371,825,876.09 : x - Step 2: Convert to fraction form
685,087,906.97/945,430,381.55 = 371,825,876.09/x - Step 3: Cross multiply
685,087,906.97x = 945,430,381.55 × 371,825,876.09 - Step 4: Simplify right side
685,087,906.97x = 351,535,479,900,072,576 - Step 5: Solve for x
x = 351,535,479,900,072,576/685,087,906.97 - Step 6: Final answer
x = 513,124,631.63
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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.