Finding the Fourth Proportional to 687.36, 948.60 and 392.63
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Solution
The fourth proportional to 687.36, 948.60 and 392.63 is: 541.85
Step by Step Solution
- Step 1: Write the proportion equation
687.36 : 948.60 = 392.63 : x - Step 2: Convert to fraction form
687.36/948.60 = 392.63/x - Step 3: Cross multiply
687.36x = 948.60 × 392.63 - Step 4: Simplify right side
687.36x = 372,444.08 - Step 5: Solve for x
x = 372,444.08/687.36 - Step 6: Final answer
x = 541.85
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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.