Finding the Fourth Proportional to 388,446,218.45, 536,049,525.53 and 212,230,430.09
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Solution
The fourth proportional to 388,446,218.45, 536,049,525.53 and 212,230,430.09 is: 292,874,575.55
Step by Step Solution
- Step 1: Write the proportion equation
388,446,218.45 : 536,049,525.53 = 212,230,430.09 : x - Step 2: Convert to fraction form
388,446,218.45/536,049,525.53 = 212,230,430.09/x - Step 3: Cross multiply
388,446,218.45x = 536,049,525.53 × 212,230,430.09 - Step 4: Simplify right side
388,446,218.45x = 113,766,021,350,622,672 - Step 5: Solve for x
x = 113,766,021,350,622,672/388,446,218.45 - Step 6: Final answer
x = 292,874,575.55
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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.