Finding the Fourth Proportional to 387,816.87, 581,708.39 and 121,571.31
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Solution
The fourth proportional to 387,816.87, 581,708.39 and 121,571.31 is: 182,351.66
Step by Step Solution
- Step 1: Write the proportion equation
387,816.87 : 581,708.39 = 121,571.31 : x - Step 2: Convert to fraction form
387,816.87/581,708.39 = 121,571.31/x - Step 3: Cross multiply
387,816.87x = 581,708.39 × 121,571.31 - Step 4: Simplify right side
387,816.87x = 70,719,050,402.43 - Step 5: Solve for x
x = 70,719,050,402.43/387,816.87 - Step 6: Final answer
x = 182,351.66
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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.