Finding the Third Proportional to 243 and 309
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Solution
The third proportional to 243 and 309 is: 392.93
Step by Step Solution
- Step 1: Write the proportion equation
243 : 309 = 309 : x - Step 2: Convert to fraction form
243/309 = 309/x - Step 3: Cross multiply
243x = 309 × 309 - Step 4: Simplify right side
243x = 95,481 - Step 5: Solve for x
x = 95,481/243 - Step 6: Final answer
x = 392.93
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These problems maintain the same ratio (1.27) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.