Finding the Fourth Proportional to 480,742.40, 720,163.20 and 421,644.80
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Solution
The fourth proportional to 480,742.40, 720,163.20 and 421,644.80 is: 631,633.63
Step by Step Solution
- Step 1: Write the proportion equation
480,742.40 : 720,163.20 = 421,644.80 : x - Step 2: Convert to fraction form
480,742.40/720,163.20 = 421,644.80/x - Step 3: Cross multiply
480,742.40x = 720,163.20 × 421,644.80 - Step 4: Simplify right side
480,742.40x = 303,653,068,431.36 - Step 5: Solve for x
x = 303,653,068,431.36/480,742.40 - Step 6: Final answer
x = 631,633.63
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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.