Finding the Fourth Proportional to 386,249.20, 579,431.40 and 136,911.60
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Solution
The fourth proportional to 386,249.20, 579,431.40 and 136,911.60 is: 205,387.82
Step by Step Solution
- Step 1: Write the proportion equation
386,249.20 : 579,431.40 = 136,911.60 : x - Step 2: Convert to fraction form
386,249.20/579,431.40 = 136,911.60/x - Step 3: Cross multiply
386,249.20x = 579,431.40 × 136,911.60 - Step 4: Simplify right side
386,249.20x = 79,330,880,064.24 - Step 5: Solve for x
x = 79,330,880,064.24/386,249.20 - Step 6: Final answer
x = 205,387.82
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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.