Finding the Fourth Proportional to 252,425.40, 378,638.10 and 74,959.80
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Solution
The fourth proportional to 252,425.40, 378,638.10 and 74,959.80 is: 112,439.70
Step by Step Solution
- Step 1: Write the proportion equation
252,425.40 : 378,638.10 = 74,959.80 : x - Step 2: Convert to fraction form
252,425.40/378,638.10 = 74,959.80/x - Step 3: Cross multiply
252,425.40x = 378,638.10 × 74,959.80 - Step 4: Simplify right side
252,425.40x = 28,382,636,248.38 - Step 5: Solve for x
x = 28,382,636,248.38/252,425.40 - Step 6: Final answer
x = 112,439.70
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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.