Finding the Fourth Proportional to 407.70, 611.62 and 133.70
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Solution
The fourth proportional to 407.70, 611.62 and 133.70 is: 200.57
Step by Step Solution
- Step 1: Write the proportion equation
407.70 : 611.62 = 133.70 : x - Step 2: Convert to fraction form
407.70/611.62 = 133.70/x - Step 3: Cross multiply
407.70x = 611.62 × 133.70 - Step 4: Simplify right side
407.70x = 81,773.59 - Step 5: Solve for x
x = 81,773.59/407.70 - Step 6: Final answer
x = 200.57
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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.