Finding the Fourth Proportional to 208,553.80, 312,830.70 and 129,821.80
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Solution
The fourth proportional to 208,553.80, 312,830.70 and 129,821.80 is: 194,732.70
Step by Step Solution
- Step 1: Write the proportion equation
208,553.80 : 312,830.70 = 129,821.80 : x - Step 2: Convert to fraction form
208,553.80/312,830.70 = 129,821.80/x - Step 3: Cross multiply
208,553.80x = 312,830.70 × 129,821.80 - Step 4: Simplify right side
208,553.80x = 40,612,244,569.26 - Step 5: Solve for x
x = 40,612,244,569.26/208,553.80 - Step 6: Final answer
x = 194,732.70
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1.5x scale
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.