Finding the Fourth Proportional to 42.21, 58.21 and 29.09
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Solution
The fourth proportional to 42.21, 58.21 and 29.09 is: 40.12
Step by Step Solution
- Step 1: Write the proportion equation
42.21 : 58.21 = 29.09 : x - Step 2: Convert to fraction form
42.21/58.21 = 29.09/x - Step 3: Cross multiply
42.21x = 58.21 × 29.09 - Step 4: Simplify right side
42.21x = 1,693.33 - Step 5: Solve for x
x = 1,693.33/42.21 - Step 6: Final answer
x = 40.12
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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.