Finding the Third Proportional to 420,138.50 and 628,740.75
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Solution
The third proportional to 420,138.50 and 628,740.75 is: 940,915.75
Step by Step Solution
- Step 1: Write the proportion equation
420,138.50 : 628,740.75 = 628,740.75 : x - Step 2: Convert to fraction form
420,138.50/628,740.75 = 628,740.75/x - Step 3: Cross multiply
420,138.50x = 628,740.75 × 628,740.75 - Step 4: Simplify right side
420,138.50x = 395,314,930,710.56 - Step 5: Solve for x
x = 395,314,930,710.56/420,138.50 - Step 6: Final answer
x = 940,915.75
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.