Finding the Fourth Proportional to 728,561.68, 1,005,410.56 and 406,275.68
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Solution
The fourth proportional to 728,561.68, 1,005,410.56 and 406,275.68 is: 560,657.90
Step by Step Solution
- Step 1: Write the proportion equation
728,561.68 : 1,005,410.56 = 406,275.68 : x - Step 2: Convert to fraction form
728,561.68/1,005,410.56 = 406,275.68/x - Step 3: Cross multiply
728,561.68x = 1,005,410.56 × 406,275.68 - Step 4: Simplify right side
728,561.68x = 408,473,858,943.18 - Step 5: Solve for x
x = 408,473,858,943.18/728,561.68 - Step 6: Final answer
x = 560,657.90
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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.