Finding the Fourth Proportional to 292.62, 438.99 and 87.18
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Solution
The fourth proportional to 292.62, 438.99 and 87.18 is: 130.79
Step by Step Solution
- Step 1: Write the proportion equation
292.62 : 438.99 = 87.18 : x - Step 2: Convert to fraction form
292.62/438.99 = 87.18/x - Step 3: Cross multiply
292.62x = 438.99 × 87.18 - Step 4: Simplify right side
292.62x = 38,271.15 - Step 5: Solve for x
x = 38,271.15/292.62 - Step 6: Final answer
x = 130.79
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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.