Finding the Fourth Proportional to 985,341.20, 1,478,400.60 and 386,200.40
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Solution
The fourth proportional to 985,341.20, 1,478,400.60 and 386,200.40 is: 579,452.99
Step by Step Solution
- Step 1: Write the proportion equation
985,341.20 : 1,478,400.60 = 386,200.40 : x - Step 2: Convert to fraction form
985,341.20/1,478,400.60 = 386,200.40/x - Step 3: Cross multiply
985,341.20x = 1,478,400.60 × 386,200.40 - Step 4: Simplify right side
985,341.20x = 570,958,903,080.24 - Step 5: Solve for x
x = 570,958,903,080.24/985,341.20 - Step 6: Final answer
x = 579,452.99
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.