Finding the Fourth Proportional to 409,261.12, 613,833.36 and 128,771.08
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Solution
The fourth proportional to 409,261.12, 613,833.36 and 128,771.08 is: 193,138.27
Step by Step Solution
- Step 1: Write the proportion equation
409,261.12 : 613,833.36 = 128,771.08 : x - Step 2: Convert to fraction form
409,261.12/613,833.36 = 128,771.08/x - Step 3: Cross multiply
409,261.12x = 613,833.36 × 128,771.08 - Step 4: Simplify right side
409,261.12x = 79,043,984,707.23 - Step 5: Solve for x
x = 79,043,984,707.23/409,261.12 - Step 6: Final answer
x = 193,138.27
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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.