Finding the Fourth Proportional to 378,731,029.70, 528,932,039.95 and 378,731,029.70
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Solution
The fourth proportional to 378,731,029.70, 528,932,039.95 and 378,731,029.70 is: 528,932,039.95
Step by Step Solution
- Step 1: Write the proportion equation
378,731,029.70 : 528,932,039.95 = 378,731,029.70 : x - Step 2: Convert to fraction form
378,731,029.70/528,932,039.95 = 378,731,029.70/x - Step 3: Cross multiply
378,731,029.70x = 528,932,039.95 × 378,731,029.70 - Step 4: Simplify right side
378,731,029.70x = 200,322,976,131,585,024 - Step 5: Solve for x
x = 200,322,976,131,585,024/378,731,029.70 - Step 6: Final answer
x = 528,932,039.95
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Why These Related Problems?
These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.