Finding the Fourth Proportional to 212,814.20, 319,221.30 and 209,703.80
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Solution
The fourth proportional to 212,814.20, 319,221.30 and 209,703.80 is: 314,555.70
Step by Step Solution
- Step 1: Write the proportion equation
212,814.20 : 319,221.30 = 209,703.80 : x - Step 2: Convert to fraction form
212,814.20/319,221.30 = 209,703.80/x - Step 3: Cross multiply
212,814.20x = 319,221.30 × 209,703.80 - Step 4: Simplify right side
212,814.20x = 66,941,919,650.94 - Step 5: Solve for x
x = 66,941,919,650.94/212,814.20 - Step 6: Final answer
x = 314,555.70
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1.5x scale
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.