Finding the Fourth Proportional to 286.68, 430.08 and 91.68
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Solution
The fourth proportional to 286.68, 430.08 and 91.68 is: 137.54
Step by Step Solution
- Step 1: Write the proportion equation
286.68 : 430.08 = 91.68 : x - Step 2: Convert to fraction form
286.68/430.08 = 91.68/x - Step 3: Cross multiply
286.68x = 430.08 × 91.68 - Step 4: Simplify right side
286.68x = 39,429.73 - Step 5: Solve for x
x = 39,429.73/286.68 - Step 6: Final answer
x = 137.54
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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.