Finding the Third Proportional to 870 and 979.50
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Solution
The third proportional to 870 and 979.50 is: 1,102.78
Step by Step Solution
- Step 1: Write the proportion equation
870 : 979.50 = 979.50 : x - Step 2: Convert to fraction form
870/979.50 = 979.50/x - Step 3: Cross multiply
870x = 979.50 × 979.50 - Step 4: Simplify right side
870x = 959,420.25 - Step 5: Solve for x
x = 959,420.25/870 - Step 6: Final answer
x = 1,102.78
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These problems maintain the same ratio (1.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.