Finding the Fourth Proportional to 331.45, 457.05 and 214.99
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Solution
The fourth proportional to 331.45, 457.05 and 214.99 is: 296.46
Step by Step Solution
- Step 1: Write the proportion equation
331.45 : 457.05 = 214.99 : x - Step 2: Convert to fraction form
331.45/457.05 = 214.99/x - Step 3: Cross multiply
331.45x = 457.05 × 214.99 - Step 4: Simplify right side
331.45x = 98,261.18 - Step 5: Solve for x
x = 98,261.18/331.45 - Step 6: Final answer
x = 296.46
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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.