Finding the Fourth Proportional to 42.38, 58.45 and 30.09
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Solution
The fourth proportional to 42.38, 58.45 and 30.09 is: 41.50
Step by Step Solution
- Step 1: Write the proportion equation
42.38 : 58.45 = 30.09 : x - Step 2: Convert to fraction form
42.38/58.45 = 30.09/x - Step 3: Cross multiply
42.38x = 58.45 × 30.09 - Step 4: Simplify right side
42.38x = 1,758.76 - Step 5: Solve for x
x = 1,758.76/42.38 - Step 6: Final answer
x = 41.50
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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.