Finding the Fourth Proportional to 489,129.70, 683,381.90 and 489,129.70
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Solution
The fourth proportional to 489,129.70, 683,381.90 and 489,129.70 is: 683,381.90
Step by Step Solution
- Step 1: Write the proportion equation
489,129.70 : 683,381.90 = 489,129.70 : x - Step 2: Convert to fraction form
489,129.70/683,381.90 = 489,129.70/x - Step 3: Cross multiply
489,129.70x = 683,381.90 × 489,129.70 - Step 4: Simplify right side
489,129.70x = 334,262,383,732.43 - Step 5: Solve for x
x = 334,262,383,732.43/489,129.70 - Step 6: Final answer
x = 683,381.90
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Why These Related Problems?
These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.