Finding the Fourth Proportional to 305,662.41, 458,346.14 and 128,121.75
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Solution
The fourth proportional to 305,662.41, 458,346.14 and 128,121.75 is: 192,120.81
Step by Step Solution
- Step 1: Write the proportion equation
305,662.41 : 458,346.14 = 128,121.75 : x - Step 2: Convert to fraction form
305,662.41/458,346.14 = 128,121.75/x - Step 3: Cross multiply
305,662.41x = 458,346.14 × 128,121.75 - Step 4: Simplify right side
305,662.41x = 58,724,109,562.55 - Step 5: Solve for x
x = 58,724,109,562.55/305,662.41 - Step 6: Final answer
x = 192,120.81
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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.