Finding the Fourth Proportional to 378,053,311.34, 521,366,857.55 and 259,148,702
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Solution
The fourth proportional to 378,053,311.34, 521,366,857.55 and 259,148,702 is: 357,387,543.89
Step by Step Solution
- Step 1: Write the proportion equation
378,053,311.34 : 521,366,857.55 = 259,148,702 : x - Step 2: Convert to fraction form
378,053,311.34/521,366,857.55 = 259,148,702/x - Step 3: Cross multiply
378,053,311.34x = 521,366,857.55 × 259,148,702 - Step 4: Simplify right side
378,053,311.34x = 135,111,544,399,901,408 - Step 5: Solve for x
x = 135,111,544,399,901,408/378,053,311.34 - Step 6: Final answer
x = 357,387,543.89
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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.