Finding the Fourth Proportional to 391,940,771.36, 540,602,891.33 and 257,935,992.57
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Solution
The fourth proportional to 391,940,771.36, 540,602,891.33 and 257,935,992.57 is: 355,770,446.84
Step by Step Solution
- Step 1: Write the proportion equation
391,940,771.36 : 540,602,891.33 = 257,935,992.57 : x - Step 2: Convert to fraction form
391,940,771.36/540,602,891.33 = 257,935,992.57/x - Step 3: Cross multiply
391,940,771.36x = 540,602,891.33 × 257,935,992.57 - Step 4: Simplify right side
391,940,771.36x = 139,440,943,360,125,728 - Step 5: Solve for x
x = 139,440,943,360,125,728/391,940,771.36 - Step 6: Final answer
x = 355,770,446.84
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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.