Finding the Fourth Proportional to 840,415.28, 1,260,633.84 and 279,449.76
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Solution
The fourth proportional to 840,415.28, 1,260,633.84 and 279,449.76 is: 419,178.27
Step by Step Solution
- Step 1: Write the proportion equation
840,415.28 : 1,260,633.84 = 279,449.76 : x - Step 2: Convert to fraction form
840,415.28/1,260,633.84 = 279,449.76/x - Step 3: Cross multiply
840,415.28x = 1,260,633.84 × 279,449.76 - Step 4: Simplify right side
840,415.28x = 352,283,824,035.88 - Step 5: Solve for x
x = 352,283,824,035.88/840,415.28 - Step 6: Final answer
x = 419,178.27
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1.5x scale
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.