Finding the Fourth Proportional to 228.70, 315.21 and 154.99
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Solution
The fourth proportional to 228.70, 315.21 and 154.99 is: 213.62
Step by Step Solution
- Step 1: Write the proportion equation
228.70 : 315.21 = 154.99 : x - Step 2: Convert to fraction form
228.70/315.21 = 154.99/x - Step 3: Cross multiply
228.70x = 315.21 × 154.99 - Step 4: Simplify right side
228.70x = 48,854.40 - Step 5: Solve for x
x = 48,854.40/228.70 - Step 6: Final answer
x = 213.62
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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.