Finding the Fourth Proportional to 665,285.43, 918,257.90 and 378,974.32
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Solution
The fourth proportional to 665,285.43, 918,257.90 and 378,974.32 is: 523,077.99
Step by Step Solution
- Step 1: Write the proportion equation
665,285.43 : 918,257.90 = 378,974.32 : x - Step 2: Convert to fraction form
665,285.43/918,257.90 = 378,974.32/x - Step 3: Cross multiply
665,285.43x = 918,257.90 × 378,974.32 - Step 4: Simplify right side
665,285.43x = 347,996,165,532.77 - Step 5: Solve for x
x = 347,996,165,532.77/665,285.43 - Step 6: Final answer
x = 523,077.99
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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.