Finding the Fourth Proportional to 393,617.40, 590,717.70 and 157,129.80
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Solution
The fourth proportional to 393,617.40, 590,717.70 and 157,129.80 is: 235,811.11
Step by Step Solution
- Step 1: Write the proportion equation
393,617.40 : 590,717.70 = 157,129.80 : x - Step 2: Convert to fraction form
393,617.40/590,717.70 = 157,129.80/x - Step 3: Cross multiply
393,617.40x = 590,717.70 × 157,129.80 - Step 4: Simplify right side
393,617.40x = 92,819,354,057.46 - Step 5: Solve for x
x = 92,819,354,057.46/393,617.40 - Step 6: Final answer
x = 235,811.11
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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.