Finding the Fourth Proportional to 391,693.75, 540,540.80 and 212,845.75
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Solution
The fourth proportional to 391,693.75, 540,540.80 and 212,845.75 is: 293,728.99
Step by Step Solution
- Step 1: Write the proportion equation
391,693.75 : 540,540.80 = 212,845.75 : x - Step 2: Convert to fraction form
391,693.75/540,540.80 = 212,845.75/x - Step 3: Cross multiply
391,693.75x = 540,540.80 × 212,845.75 - Step 4: Simplify right side
391,693.75x = 115,051,810,917.37 - Step 5: Solve for x
x = 115,051,810,917.37/391,693.75 - Step 6: Final answer
x = 293,728.99
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.