Finding the Fourth Proportional to 221,302.20, 331,515.90 and 121,283.40
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Solution
The fourth proportional to 221,302.20, 331,515.90 and 121,283.40 is: 181,685.39
Step by Step Solution
- Step 1: Write the proportion equation
221,302.20 : 331,515.90 = 121,283.40 : x - Step 2: Convert to fraction form
221,302.20/331,515.90 = 121,283.40/x - Step 3: Cross multiply
221,302.20x = 331,515.90 × 121,283.40 - Step 4: Simplify right side
221,302.20x = 40,207,375,506.06 - Step 5: Solve for x
x = 40,207,375,506.06/221,302.20 - Step 6: Final answer
x = 181,685.39
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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.