Finding the Fourth Proportional to 489,122.10, 685,237.50 and 489,122.10
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Solution
The fourth proportional to 489,122.10, 685,237.50 and 489,122.10 is: 685,237.50
Step by Step Solution
- Step 1: Write the proportion equation
489,122.10 : 685,237.50 = 489,122.10 : x - Step 2: Convert to fraction form
489,122.10/685,237.50 = 489,122.10/x - Step 3: Cross multiply
489,122.10x = 685,237.50 × 489,122.10 - Step 4: Simplify right side
489,122.10x = 335,164,804,998.75 - Step 5: Solve for x
x = 335,164,804,998.75/489,122.10 - Step 6: Final answer
x = 685,237.50
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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.