Finding the Fourth Proportional to 421,207.80, 631,811.70 and 168,609.30
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Solution
The fourth proportional to 421,207.80, 631,811.70 and 168,609.30 is: 252,913.95
Step by Step Solution
- Step 1: Write the proportion equation
421,207.80 : 631,811.70 = 168,609.30 : x - Step 2: Convert to fraction form
421,207.80/631,811.70 = 168,609.30/x - Step 3: Cross multiply
421,207.80x = 631,811.70 × 168,609.30 - Step 4: Simplify right side
421,207.80x = 106,529,328,468.81 - Step 5: Solve for x
x = 106,529,328,468.81/421,207.80 - Step 6: Final answer
x = 252,913.95
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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.