Finding the Fourth Proportional to 319.90, 479.99 and 173.75
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Solution
The fourth proportional to 319.90, 479.99 and 173.75 is: 260.70
Step by Step Solution
- Step 1: Write the proportion equation
319.90 : 479.99 = 173.75 : x - Step 2: Convert to fraction form
319.90/479.99 = 173.75/x - Step 3: Cross multiply
319.90x = 479.99 × 173.75 - Step 4: Simplify right side
319.90x = 83,398.26 - Step 5: Solve for x
x = 83,398.26/319.90 - Step 6: Final answer
x = 260.70
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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.