Finding the Fourth Proportional to 228.23, 314.99 and 129.99
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Solution
The fourth proportional to 228.23, 314.99 and 129.99 is: 179.41
Step by Step Solution
- Step 1: Write the proportion equation
228.23 : 314.99 = 129.99 : x - Step 2: Convert to fraction form
228.23/314.99 = 129.99/x - Step 3: Cross multiply
228.23x = 314.99 × 129.99 - Step 4: Simplify right side
228.23x = 40,944.90 - Step 5: Solve for x
x = 40,944.90/228.23 - Step 6: Final answer
x = 179.41
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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.