Finding the Fourth Proportional to 378,540,887.43, 522,387,147.42 and 208,995,453.12
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Solution
The fourth proportional to 378,540,887.43, 522,387,147.42 and 208,995,453.12 is: 288,414,124.35
Step by Step Solution
- Step 1: Write the proportion equation
378,540,887.43 : 522,387,147.42 = 208,995,453.12 : x - Step 2: Convert to fraction form
378,540,887.43/522,387,147.42 = 208,995,453.12/x - Step 3: Cross multiply
378,540,887.43x = 522,387,147.42 × 208,995,453.12 - Step 4: Simplify right side
378,540,887.43x = 109,176,538,579,107,152 - Step 5: Solve for x
x = 109,176,538,579,107,152/378,540,887.43 - Step 6: Final answer
x = 288,414,124.35
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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.