Finding the Fourth Proportional to 725,659.26, 1,001,421.84 and 398,986.08
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Solution
The fourth proportional to 725,659.26, 1,001,421.84 and 398,986.08 is: 550,607.42
Step by Step Solution
- Step 1: Write the proportion equation
725,659.26 : 1,001,421.84 = 398,986.08 : x - Step 2: Convert to fraction form
725,659.26/1,001,421.84 = 398,986.08/x - Step 3: Cross multiply
725,659.26x = 1,001,421.84 × 398,986.08 - Step 4: Simplify right side
725,659.26x = 399,553,374,367.99 - Step 5: Solve for x
x = 399,553,374,367.99/725,659.26 - Step 6: Final answer
x = 550,607.42
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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.