Finding the Fourth Proportional to 431.65, 647.11 and 187.99
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Solution
The fourth proportional to 431.65, 647.11 and 187.99 is: 281.83
Step by Step Solution
- Step 1: Write the proportion equation
431.65 : 647.11 = 187.99 : x - Step 2: Convert to fraction form
431.65/647.11 = 187.99/x - Step 3: Cross multiply
431.65x = 647.11 × 187.99 - Step 4: Simplify right side
431.65x = 121,650.21 - Step 5: Solve for x
x = 121,650.21/431.65 - Step 6: Final answer
x = 281.83
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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.