Finding the Fourth Proportional to 420,821.40, 631,232.10 and 121,275.30
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Solution
The fourth proportional to 420,821.40, 631,232.10 and 121,275.30 is: 181,912.95
Step by Step Solution
- Step 1: Write the proportion equation
420,821.40 : 631,232.10 = 121,275.30 : x - Step 2: Convert to fraction form
420,821.40/631,232.10 = 121,275.30/x - Step 3: Cross multiply
420,821.40x = 631,232.10 × 121,275.30 - Step 4: Simplify right side
420,821.40x = 76,552,862,297.13 - Step 5: Solve for x
x = 76,552,862,297.13/420,821.40 - Step 6: Final answer
x = 181,912.95
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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.