Finding the Fourth Proportional to 319.19, 440.21 and 257.00
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Solution
The fourth proportional to 319.19, 440.21 and 257.00 is: 354.44
Step by Step Solution
- Step 1: Write the proportion equation
319.19 : 440.21 = 257.00 : x - Step 2: Convert to fraction form
319.19/440.21 = 257.00/x - Step 3: Cross multiply
319.19x = 440.21 × 257.00 - Step 4: Simplify right side
319.19x = 113,132.93 - Step 5: Solve for x
x = 113,132.93/319.19 - Step 6: Final answer
x = 354.44
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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.