Finding the Fourth Proportional to 228.55, 342.88 and 74.49
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Solution
The fourth proportional to 228.55, 342.88 and 74.49 is: 111.75
Step by Step Solution
- Step 1: Write the proportion equation
228.55 : 342.88 = 74.49 : x - Step 2: Convert to fraction form
228.55/342.88 = 74.49/x - Step 3: Cross multiply
228.55x = 342.88 × 74.49 - Step 4: Simplify right side
228.55x = 25,541.13 - Step 5: Solve for x
x = 25,541.13/228.55 - Step 6: Final answer
x = 111.75
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.