Finding the Fourth Proportional to 261,489.30, 392,493.15 and 128,519.70
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Solution
The fourth proportional to 261,489.30, 392,493.15 and 128,519.70 is: 192,906.94
Step by Step Solution
- Step 1: Write the proportion equation
261,489.30 : 392,493.15 = 128,519.70 : x - Step 2: Convert to fraction form
261,489.30/392,493.15 = 128,519.70/x - Step 3: Cross multiply
261,489.30x = 392,493.15 × 128,519.70 - Step 4: Simplify right side
261,489.30x = 50,443,101,890.06 - Step 5: Solve for x
x = 50,443,101,890.06/261,489.30 - Step 6: Final answer
x = 192,906.94
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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.