Finding the Fourth Proportional to 408,872.16, 613,378.29 and 138,971.75
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Solution
The fourth proportional to 408,872.16, 613,378.29 and 138,971.75 is: 208,481.43
Step by Step Solution
- Step 1: Write the proportion equation
408,872.16 : 613,378.29 = 138,971.75 : x - Step 2: Convert to fraction form
408,872.16/613,378.29 = 138,971.75/x - Step 3: Cross multiply
408,872.16x = 613,378.29 × 138,971.75 - Step 4: Simplify right side
408,872.16x = 85,242,251,306.42 - Step 5: Solve for x
x = 85,242,251,306.42/408,872.16 - Step 6: Final answer
x = 208,481.43
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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.