Finding the Fourth Proportional to 720,849.60, 994,720.08 and 398,563.68
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Solution
The fourth proportional to 720,849.60, 994,720.08 and 398,563.68 is: 549,988.92
Step by Step Solution
- Step 1: Write the proportion equation
720,849.60 : 994,720.08 = 398,563.68 : x - Step 2: Convert to fraction form
720,849.60/994,720.08 = 398,563.68/x - Step 3: Cross multiply
720,849.60x = 994,720.08 × 398,563.68 - Step 4: Simplify right side
720,849.60x = 396,459,295,654.69 - Step 5: Solve for x
x = 396,459,295,654.69/720,849.60 - Step 6: Final answer
x = 549,988.92
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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.