Finding the Fourth Proportional to 430.38, 645.44 and 122.21
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Solution
The fourth proportional to 430.38, 645.44 and 122.21 is: 183.28
Step by Step Solution
- Step 1: Write the proportion equation
430.38 : 645.44 = 122.21 : x - Step 2: Convert to fraction form
430.38/645.44 = 122.21/x - Step 3: Cross multiply
430.38x = 645.44 × 122.21 - Step 4: Simplify right side
430.38x = 78,879.22 - Step 5: Solve for x
x = 78,879.22/430.38 - Step 6: Final answer
x = 183.28
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.