Finding the Fourth Proportional to 720,931.12, 994,874.56 and 398,634.12
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Solution
The fourth proportional to 720,931.12, 994,874.56 and 398,634.12 is: 550,109.34
Step by Step Solution
- Step 1: Write the proportion equation
720,931.12 : 994,874.56 = 398,634.12 : x - Step 2: Convert to fraction form
720,931.12/994,874.56 = 398,634.12/x - Step 3: Cross multiply
720,931.12x = 994,874.56 × 398,634.12 - Step 4: Simplify right side
720,931.12x = 396,590,944,735.99 - Step 5: Solve for x
x = 396,590,944,735.99/720,931.12 - Step 6: Final answer
x = 550,109.34
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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.