Finding the Fourth Proportional to 687.08, 948.30 and 438.68
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Solution
The fourth proportional to 687.08, 948.30 and 438.68 is: 605.46
Step by Step Solution
- Step 1: Write the proportion equation
687.08 : 948.30 = 438.68 : x - Step 2: Convert to fraction form
687.08/948.30 = 438.68/x - Step 3: Cross multiply
687.08x = 948.30 × 438.68 - Step 4: Simplify right side
687.08x = 416,000.24 - Step 5: Solve for x
x = 416,000.24/687.08 - Step 6: Final answer
x = 605.46
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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.