Finding the Fourth Proportional to 386,467.40, 579,701.10 and 261,129.80
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Solution
The fourth proportional to 386,467.40, 579,701.10 and 261,129.80 is: 391,694.70
Step by Step Solution
- Step 1: Write the proportion equation
386,467.40 : 579,701.10 = 261,129.80 : x - Step 2: Convert to fraction form
386,467.40/579,701.10 = 261,129.80/x - Step 3: Cross multiply
386,467.40x = 579,701.10 × 261,129.80 - Step 4: Simplify right side
386,467.40x = 151,377,232,302.78 - Step 5: Solve for x
x = 151,377,232,302.78/386,467.40 - Step 6: Final answer
x = 391,694.70
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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.