Finding the Fourth Proportional to 427.68, 641.08 and 210.96
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Solution
The fourth proportional to 427.68, 641.08 and 210.96 is: 316.22
Step by Step Solution
- Step 1: Write the proportion equation
427.68 : 641.08 = 210.96 : x - Step 2: Convert to fraction form
427.68/641.08 = 210.96/x - Step 3: Cross multiply
427.68x = 641.08 × 210.96 - Step 4: Simplify right side
427.68x = 135,242.24 - Step 5: Solve for x
x = 135,242.24/427.68 - Step 6: Final answer
x = 316.22
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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.