Finding the Fourth Proportional to 326,099.80, 489,149.70 and 139,475.80
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Solution
The fourth proportional to 326,099.80, 489,149.70 and 139,475.80 is: 209,213.70
Step by Step Solution
- Step 1: Write the proportion equation
326,099.80 : 489,149.70 = 139,475.80 : x - Step 2: Convert to fraction form
326,099.80/489,149.70 = 139,475.80/x - Step 3: Cross multiply
326,099.80x = 489,149.70 × 139,475.80 - Step 4: Simplify right side
326,099.80x = 68,224,545,727.26 - Step 5: Solve for x
x = 68,224,545,727.26/326,099.80 - Step 6: Final answer
x = 209,213.70
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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.