Finding the Fourth Proportional to 371,910.81, 513,236.96 and 221,007.81
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Solution
The fourth proportional to 371,910.81, 513,236.96 and 221,007.81 is: 304,990.80
Step by Step Solution
- Step 1: Write the proportion equation
371,910.81 : 513,236.96 = 221,007.81 : x - Step 2: Convert to fraction form
371,910.81/513,236.96 = 221,007.81/x - Step 3: Cross multiply
371,910.81x = 513,236.96 × 221,007.81 - Step 4: Simplify right side
371,910.81x = 113,429,376,540.66 - Step 5: Solve for x
x = 113,429,376,540.66/371,910.81 - Step 6: Final answer
x = 304,990.80
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.