Finding the Fourth Proportional to 397,420.12, 548,428.05 and 225,353.80
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Solution
The fourth proportional to 397,420.12, 548,428.05 and 225,353.80 is: 310,981.60
Step by Step Solution
- Step 1: Write the proportion equation
397,420.12 : 548,428.05 = 225,353.80 : x - Step 2: Convert to fraction form
397,420.12/548,428.05 = 225,353.80/x - Step 3: Cross multiply
397,420.12x = 548,428.05 × 225,353.80 - Step 4: Simplify right side
397,420.12x = 123,590,345,779.63 - Step 5: Solve for x
x = 123,590,345,779.63/397,420.12 - Step 6: Final answer
x = 310,981.60
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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.