Finding the Fourth Proportional to 437.13, 655.70 and 128.99
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Solution
The fourth proportional to 437.13, 655.70 and 128.99 is: 193.49
Step by Step Solution
- Step 1: Write the proportion equation
437.13 : 655.70 = 128.99 : x - Step 2: Convert to fraction form
437.13/655.70 = 128.99/x - Step 3: Cross multiply
437.13x = 655.70 × 128.99 - Step 4: Simplify right side
437.13x = 84,579.74 - Step 5: Solve for x
x = 84,579.74/437.13 - Step 6: Final answer
x = 193.49
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Double scale
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Similar ratio
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1.5x scale
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.