Finding the Fourth Proportional to 149.40, 207.08 and 142.79
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Solution
The fourth proportional to 149.40, 207.08 and 142.79 is: 197.91
Step by Step Solution
- Step 1: Write the proportion equation
149.40 : 207.08 = 142.79 : x - Step 2: Convert to fraction form
149.40/207.08 = 142.79/x - Step 3: Cross multiply
149.40x = 207.08 × 142.79 - Step 4: Simplify right side
149.40x = 29,567.20 - Step 5: Solve for x
x = 29,567.20/149.40 - Step 6: Final answer
x = 197.91
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Why These Related Problems?
These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.