Finding the Fourth Proportional to 1,920,189.15, 2,880,684.68 and 640,745.55
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Solution
The fourth proportional to 1,920,189.15, 2,880,684.68 and 640,745.55 is: 961,252.12
Step by Step Solution
- Step 1: Write the proportion equation
1,920,189.15 : 2,880,684.68 = 640,745.55 : x - Step 2: Convert to fraction form
1,920,189.15/2,880,684.68 = 640,745.55/x - Step 3: Cross multiply
1,920,189.15x = 2,880,684.68 × 640,745.55 - Step 4: Simplify right side
1,920,189.15x = 1,845,785,886,459.45 - Step 5: Solve for x
x = 1,845,785,886,459.45/1,920,189.15 - Step 6: Final answer
x = 961,252.12
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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.