Finding the Fourth Proportional to 717,128.28, 989,622.84 and 394,843.68
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Solution
The fourth proportional to 717,128.28, 989,622.84 and 394,843.68 is: 544,876.47
Step by Step Solution
- Step 1: Write the proportion equation
717,128.28 : 989,622.84 = 394,843.68 : x - Step 2: Convert to fraction form
717,128.28/989,622.84 = 394,843.68/x - Step 3: Cross multiply
717,128.28x = 989,622.84 × 394,843.68 - Step 4: Simplify right side
717,128.28x = 390,746,323,957.65 - Step 5: Solve for x
x = 390,746,323,957.65/717,128.28 - Step 6: Final answer
x = 544,876.47
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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.