Finding the Third Proportional to 390 and 890.50
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Solution
The third proportional to 390 and 890.50 is: 2,033.31
Step by Step Solution
- Step 1: Write the proportion equation
390 : 890.50 = 890.50 : x - Step 2: Convert to fraction form
390/890.50 = 890.50/x - Step 3: Cross multiply
390x = 890.50 × 890.50 - Step 4: Simplify right side
390x = 792,990.25 - Step 5: Solve for x
x = 792,990.25/390 - Step 6: Final answer
x = 2,033.31
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Why These Related Problems?
These problems maintain the same ratio (2.28) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.