Finding the Fourth Proportional to 326,163.20, 489,244.80 and 139,539.20
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Solution
The fourth proportional to 326,163.20, 489,244.80 and 139,539.20 is: 209,308.80
Step by Step Solution
- Step 1: Write the proportion equation
326,163.20 : 489,244.80 = 139,539.20 : x - Step 2: Convert to fraction form
326,163.20/489,244.80 = 139,539.20/x - Step 3: Cross multiply
326,163.20x = 489,244.80 × 139,539.20 - Step 4: Simplify right side
326,163.20x = 68,268,827,996.16 - Step 5: Solve for x
x = 68,268,827,996.16/326,163.20 - Step 6: Final answer
x = 209,308.80
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Similar ratio
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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.