Finding the Fourth Proportional to 430.70, 645.68 and 170.64
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Solution
The fourth proportional to 430.70, 645.68 and 170.64 is: 255.80
Step by Step Solution
- Step 1: Write the proportion equation
430.70 : 645.68 = 170.64 : x - Step 2: Convert to fraction form
430.70/645.68 = 170.64/x - Step 3: Cross multiply
430.70x = 645.68 × 170.64 - Step 4: Simplify right side
430.70x = 110,175.18 - Step 5: Solve for x
x = 110,175.18/430.70 - Step 6: Final answer
x = 255.80
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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.