Finding the Fourth Proportional to 742,979.31, 1,025,291.68 and 420,720
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Solution
The fourth proportional to 742,979.31, 1,025,291.68 and 420,720 is: 580,582.41
Step by Step Solution
- Step 1: Write the proportion equation
742,979.31 : 1,025,291.68 = 420,720 : x - Step 2: Convert to fraction form
742,979.31/1,025,291.68 = 420,720/x - Step 3: Cross multiply
742,979.31x = 1,025,291.68 × 420,720 - Step 4: Simplify right side
742,979.31x = 431,360,715,609.60 - Step 5: Solve for x
x = 431,360,715,609.60/742,979.31 - Step 6: Final answer
x = 580,582.41
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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.