Finding the Fourth Proportional to 212,421.20, 318,631.80 and 202,053.20
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Solution
The fourth proportional to 212,421.20, 318,631.80 and 202,053.20 is: 303,079.80
Step by Step Solution
- Step 1: Write the proportion equation
212,421.20 : 318,631.80 = 202,053.20 : x - Step 2: Convert to fraction form
212,421.20/318,631.80 = 202,053.20/x - Step 3: Cross multiply
212,421.20x = 318,631.80 × 202,053.20 - Step 4: Simplify right side
212,421.20x = 64,380,574,811.76 - Step 5: Solve for x
x = 64,380,574,811.76/212,421.20 - Step 6: Final answer
x = 303,079.80
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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.