Finding the Fourth Proportional to 1,939,986.10, 2,909,979.15 and 1,268,139.70
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Solution
The fourth proportional to 1,939,986.10, 2,909,979.15 and 1,268,139.70 is: 1,902,209.55
Step by Step Solution
- Step 1: Write the proportion equation
1,939,986.10 : 2,909,979.15 = 1,268,139.70 : x - Step 2: Convert to fraction form
1,939,986.10/2,909,979.15 = 1,268,139.70/x - Step 3: Cross multiply
1,939,986.10x = 2,909,979.15 × 1,268,139.70 - Step 4: Simplify right side
1,939,986.10x = 3,690,260,086,287.26 - Step 5: Solve for x
x = 3,690,260,086,287.26/1,939,986.10 - Step 6: Final answer
x = 1,902,209.55
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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.