Finding the Third Proportional to 783 and 1,290
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Solution
The third proportional to 783 and 1,290 is: 2,125.29
Step by Step Solution
- Step 1: Write the proportion equation
783 : 1,290 = 1,290 : x - Step 2: Convert to fraction form
783/1,290 = 1,290/x - Step 3: Cross multiply
783x = 1,290 × 1,290 - Step 4: Simplify right side
783x = 1,664,100 - Step 5: Solve for x
x = 1,664,100/783 - Step 6: Final answer
x = 2,125.29
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These problems maintain the same ratio (1.65) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.