Finding the Fourth Proportional to 1,386,390.20, 2,079,585.30 and 1,331,277.80
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Solution
The fourth proportional to 1,386,390.20, 2,079,585.30 and 1,331,277.80 is: 1,996,916.70
Step by Step Solution
- Step 1: Write the proportion equation
1,386,390.20 : 2,079,585.30 = 1,331,277.80 : x - Step 2: Convert to fraction form
1,386,390.20/2,079,585.30 = 1,331,277.80/x - Step 3: Cross multiply
1,386,390.20x = 2,079,585.30 × 1,331,277.80 - Step 4: Simplify right side
1,386,390.20x = 2,768,505,743,096.34 - Step 5: Solve for x
x = 2,768,505,743,096.34/1,386,390.20 - Step 6: Final answer
x = 1,996,916.70
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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.