Finding the Fourth Proportional to 261,841.20, 392,502.60 and 128,612.40
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Solution
The fourth proportional to 261,841.20, 392,502.60 and 128,612.40 is: 192,791.28
Step by Step Solution
- Step 1: Write the proportion equation
261,841.20 : 392,502.60 = 128,612.40 : x - Step 2: Convert to fraction form
261,841.20/392,502.60 = 128,612.40/x - Step 3: Cross multiply
261,841.20x = 392,502.60 × 128,612.40 - Step 4: Simplify right side
261,841.20x = 50,480,701,392.24 - Step 5: Solve for x
x = 50,480,701,392.24/261,841.20 - Step 6: Final answer
x = 192,791.28
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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.