Finding the Fourth Proportional to 354.62, 531.99 and 138.20
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Solution
The fourth proportional to 354.62, 531.99 and 138.20 is: 207.32
Step by Step Solution
- Step 1: Write the proportion equation
354.62 : 531.99 = 138.20 : x - Step 2: Convert to fraction form
354.62/531.99 = 138.20/x - Step 3: Cross multiply
354.62x = 531.99 × 138.20 - Step 4: Simplify right side
354.62x = 73,518.36 - Step 5: Solve for x
x = 73,518.36/354.62 - Step 6: Final answer
x = 207.32
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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.