Finding the Fourth Proportional to 386,446.80, 579,670.20 and 209,299.80
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Solution
The fourth proportional to 386,446.80, 579,670.20 and 209,299.80 is: 313,949.70
Step by Step Solution
- Step 1: Write the proportion equation
386,446.80 : 579,670.20 = 209,299.80 : x - Step 2: Convert to fraction form
386,446.80/579,670.20 = 209,299.80/x - Step 3: Cross multiply
386,446.80x = 579,670.20 × 209,299.80 - Step 4: Simplify right side
386,446.80x = 121,324,856,925.96 - Step 5: Solve for x
x = 121,324,856,925.96/386,446.80 - Step 6: Final answer
x = 313,949.70
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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.