Finding the Fourth Proportional to 720,355.84, 994,150.92 and 398,128.84
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Solution
The fourth proportional to 720,355.84, 994,150.92 and 398,128.84 is: 549,450.88
Step by Step Solution
- Step 1: Write the proportion equation
720,355.84 : 994,150.92 = 398,128.84 : x - Step 2: Convert to fraction form
720,355.84/994,150.92 = 398,128.84/x - Step 3: Cross multiply
720,355.84x = 994,150.92 × 398,128.84 - Step 4: Simplify right side
720,355.84x = 395,800,152,564.53 - Step 5: Solve for x
x = 395,800,152,564.53/720,355.84 - Step 6: Final answer
x = 549,450.88
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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.