Finding the Fourth Proportional to 742,638.14, 1,024,765.84 and 420,292.11
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Solution
The fourth proportional to 742,638.14, 1,024,765.84 and 420,292.11 is: 579,960.79
Step by Step Solution
- Step 1: Write the proportion equation
742,638.14 : 1,024,765.84 = 420,292.11 : x - Step 2: Convert to fraction form
742,638.14/1,024,765.84 = 420,292.11/x - Step 3: Cross multiply
742,638.14x = 1,024,765.84 × 420,292.11 - Step 4: Simplify right side
742,638.14x = 430,701,001,517.76 - Step 5: Solve for x
x = 430,701,001,517.76/742,638.14 - Step 6: Final answer
x = 579,960.79
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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.