Finding the Fourth Proportional to 665,533.36, 918,624.45 and 393,695.75
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Solution
The fourth proportional to 665,533.36, 918,624.45 and 393,695.75 is: 543,411.59
Step by Step Solution
- Step 1: Write the proportion equation
665,533.36 : 918,624.45 = 393,695.75 : x - Step 2: Convert to fraction form
665,533.36/918,624.45 = 393,695.75/x - Step 3: Cross multiply
665,533.36x = 918,624.45 × 393,695.75 - Step 4: Simplify right side
665,533.36x = 361,658,542,861.97 - Step 5: Solve for x
x = 361,658,542,861.97/665,533.36 - Step 6: Final answer
x = 543,411.59
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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.