Finding the Fourth Proportional to 378,897,814.40, 568,346,721.60 and 215,639,139.20
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Solution
The fourth proportional to 378,897,814.40, 568,346,721.60 and 215,639,139.20 is: 323,458,708.80
Step by Step Solution
- Step 1: Write the proportion equation
378,897,814.40 : 568,346,721.60 = 215,639,139.20 : x - Step 2: Convert to fraction form
378,897,814.40/568,346,721.60 = 215,639,139.20/x - Step 3: Cross multiply
378,897,814.40x = 568,346,721.60 × 215,639,139.20 - Step 4: Simplify right side
378,897,814.40x = 122,557,797,812,966,048 - Step 5: Solve for x
x = 122,557,797,812,966,048/378,897,814.40 - Step 6: Final answer
x = 323,458,708.80
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.