Finding the Fourth Proportional to 810,432.20, 1,214,905.20 and 311,420.36
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Solution
The fourth proportional to 810,432.20, 1,214,905.20 and 311,420.36 is: 466,844.99
Step by Step Solution
- Step 1: Write the proportion equation
810,432.20 : 1,214,905.20 = 311,420.36 : x - Step 2: Convert to fraction form
810,432.20/1,214,905.20 = 311,420.36/x - Step 3: Cross multiply
810,432.20x = 1,214,905.20 × 311,420.36 - Step 4: Simplify right side
810,432.20x = 378,346,214,749.87 - Step 5: Solve for x
x = 378,346,214,749.87/810,432.20 - Step 6: Final answer
x = 466,844.99
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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.