Finding the Fourth Proportional to 42.09, 63.18 and 30.03
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Solution
The fourth proportional to 42.09, 63.18 and 30.03 is: 45.08
Step by Step Solution
- Step 1: Write the proportion equation
42.09 : 63.18 = 30.03 : x - Step 2: Convert to fraction form
42.09/63.18 = 30.03/x - Step 3: Cross multiply
42.09x = 63.18 × 30.03 - Step 4: Simplify right side
42.09x = 1,897.30 - Step 5: Solve for x
x = 1,897.30/42.09 - Step 6: Final answer
x = 45.08
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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.