Finding the Fourth Proportional to 665,481.57, 918,808.01 and 393,636.79
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Solution
The fourth proportional to 665,481.57, 918,808.01 and 393,636.79 is: 543,481.07
Step by Step Solution
- Step 1: Write the proportion equation
665,481.57 : 918,808.01 = 393,636.79 : x - Step 2: Convert to fraction form
665,481.57/918,808.01 = 393,636.79/x - Step 3: Cross multiply
665,481.57x = 918,808.01 × 393,636.79 - Step 4: Simplify right side
665,481.57x = 361,676,635,682.69 - Step 5: Solve for x
x = 361,676,635,682.69/665,481.57 - Step 6: Final answer
x = 543,481.07
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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.