Finding the Fourth Proportional to 286.98, 430.26 and 91.91
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Solution
The fourth proportional to 286.98, 430.26 and 91.91 is: 137.80
Step by Step Solution
- Step 1: Write the proportion equation
286.98 : 430.26 = 91.91 : x - Step 2: Convert to fraction form
286.98/430.26 = 91.91/x - Step 3: Cross multiply
286.98x = 430.26 × 91.91 - Step 4: Simplify right side
286.98x = 39,545.93 - Step 5: Solve for x
x = 39,545.93/286.98 - Step 6: Final answer
x = 137.80
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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.