Finding the Fourth Proportional to 686,920.22, 947,329.39 and 428,820.99
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Solution
The fourth proportional to 686,920.22, 947,329.39 and 428,820.99 is: 591,385.60
Step by Step Solution
- Step 1: Write the proportion equation
686,920.22 : 947,329.39 = 428,820.99 : x - Step 2: Convert to fraction form
686,920.22/947,329.39 = 428,820.99/x - Step 3: Cross multiply
686,920.22x = 947,329.39 × 428,820.99 - Step 4: Simplify right side
686,920.22x = 406,234,726,875.90 - Step 5: Solve for x
x = 406,234,726,875.90/686,920.22 - Step 6: Final answer
x = 591,385.60
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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.