Finding the Fourth Proportional to 645,236.06, 890,402.46 and 354,845.12
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Solution
The fourth proportional to 645,236.06, 890,402.46 and 354,845.12 is: 489,673.45
Step by Step Solution
- Step 1: Write the proportion equation
645,236.06 : 890,402.46 = 354,845.12 : x - Step 2: Convert to fraction form
645,236.06/890,402.46 = 354,845.12/x - Step 3: Cross multiply
645,236.06x = 890,402.46 × 354,845.12 - Step 4: Simplify right side
645,236.06x = 315,954,967,767.00 - Step 5: Solve for x
x = 315,954,967,767.00/645,236.06 - Step 6: Final answer
x = 489,673.45
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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.