Finding the Fourth Proportional to 1,390,135.20, 2,085,202.80 and 491,569.80
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Solution
The fourth proportional to 1,390,135.20, 2,085,202.80 and 491,569.80 is: 737,354.70
Step by Step Solution
- Step 1: Write the proportion equation
1,390,135.20 : 2,085,202.80 = 491,569.80 : x - Step 2: Convert to fraction form
1,390,135.20/2,085,202.80 = 491,569.80/x - Step 3: Cross multiply
1,390,135.20x = 2,085,202.80 × 491,569.80 - Step 4: Simplify right side
1,390,135.20x = 1,025,022,723,355.44 - Step 5: Solve for x
x = 1,025,022,723,355.44/1,390,135.20 - Step 6: Final answer
x = 737,354.70
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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.