Finding the Third Proportional to 4,990.78 and 7,680.23
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Solution
The third proportional to 4,990.78 and 7,680.23 is: 11,818.99
Step by Step Solution
- Step 1: Write the proportion equation
4,990.78 : 7,680.23 = 7,680.23 : x - Step 2: Convert to fraction form
4,990.78/7,680.23 = 7,680.23/x - Step 3: Cross multiply
4,990.78x = 7,680.23 × 7,680.23 - Step 4: Simplify right side
4,990.78x = 58,986,000.05 - Step 5: Solve for x
x = 58,986,000.05/4,990.78 - Step 6: Final answer
x = 11,818.99
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These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.