Finding the Third Proportional to 279 and 642.50
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Solution
The third proportional to 279 and 642.50 is: 1,479.59
Step by Step Solution
- Step 1: Write the proportion equation
279 : 642.50 = 642.50 : x - Step 2: Convert to fraction form
279/642.50 = 642.50/x - Step 3: Cross multiply
279x = 642.50 × 642.50 - Step 4: Simplify right side
279x = 412,806.25 - Step 5: Solve for x
x = 412,806.25/279 - Step 6: Final answer
x = 1,479.59
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Why These Related Problems?
These problems maintain the same ratio (2.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.