Finding the Fourth Proportional to 305,409.78, 421,485.44 and 176,353.70
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Solution
The fourth proportional to 305,409.78, 421,485.44 and 176,353.70 is: 243,379.61
Step by Step Solution
- Step 1: Write the proportion equation
305,409.78 : 421,485.44 = 176,353.70 : x - Step 2: Convert to fraction form
305,409.78/421,485.44 = 176,353.70/x - Step 3: Cross multiply
305,409.78x = 421,485.44 × 176,353.70 - Step 4: Simplify right side
305,409.78x = 74,330,513,850.93 - Step 5: Solve for x
x = 74,330,513,850.93/305,409.78 - Step 6: Final answer
x = 243,379.61
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.