Finding the Fourth Proportional to 430.65, 645.61 and 186.99
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Solution
The fourth proportional to 430.65, 645.61 and 186.99 is: 280.33
Step by Step Solution
- Step 1: Write the proportion equation
430.65 : 645.61 = 186.99 : x - Step 2: Convert to fraction form
430.65/645.61 = 186.99/x - Step 3: Cross multiply
430.65x = 645.61 × 186.99 - Step 4: Simplify right side
430.65x = 120,724.23 - Step 5: Solve for x
x = 120,724.23/430.65 - Step 6: Final answer
x = 280.33
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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.