Finding the Fourth Proportional to 420,623.40, 630,935.10 and 252,661.80
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Solution
The fourth proportional to 420,623.40, 630,935.10 and 252,661.80 is: 378,992.70
Step by Step Solution
- Step 1: Write the proportion equation
420,623.40 : 630,935.10 = 252,661.80 : x - Step 2: Convert to fraction form
420,623.40/630,935.10 = 252,661.80/x - Step 3: Cross multiply
420,623.40x = 630,935.10 × 252,661.80 - Step 4: Simplify right side
420,623.40x = 159,413,198,049.18 - Step 5: Solve for x
x = 159,413,198,049.18/420,623.40 - Step 6: Final answer
x = 378,992.70
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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.