Finding the Fourth Proportional to 725,328.84, 1,000,976.34 and 398,635.92
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Solution
The fourth proportional to 725,328.84, 1,000,976.34 and 398,635.92 is: 550,129.96
Step by Step Solution
- Step 1: Write the proportion equation
725,328.84 : 1,000,976.34 = 398,635.92 : x - Step 2: Convert to fraction form
725,328.84/1,000,976.34 = 398,635.92/x - Step 3: Cross multiply
725,328.84x = 1,000,976.34 × 398,635.92 - Step 4: Simplify right side
725,328.84x = 399,025,124,194.13 - Step 5: Solve for x
x = 399,025,124,194.13/725,328.84 - Step 6: Final answer
x = 550,129.96
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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.