Finding the Fourth Proportional to 725,660.30, 1,001,423.20 and 398,987.12
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Solution
The fourth proportional to 725,660.30, 1,001,423.20 and 398,987.12 is: 550,608.82
Step by Step Solution
- Step 1: Write the proportion equation
725,660.30 : 1,001,423.20 = 398,987.12 : x - Step 2: Convert to fraction form
725,660.30/1,001,423.20 = 398,987.12/x - Step 3: Cross multiply
725,660.30x = 1,001,423.20 × 398,987.12 - Step 4: Simplify right side
725,660.30x = 399,554,958,469.18 - Step 5: Solve for x
x = 399,554,958,469.18/725,660.30 - Step 6: Final answer
x = 550,608.82
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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.