Finding the Fourth Proportional to 398.87, 598.43 and 124.99
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Solution
The fourth proportional to 398.87, 598.43 and 124.99 is: 187.52
Step by Step Solution
- Step 1: Write the proportion equation
398.87 : 598.43 = 124.99 : x - Step 2: Convert to fraction form
398.87/598.43 = 124.99/x - Step 3: Cross multiply
398.87x = 598.43 × 124.99 - Step 4: Simplify right side
398.87x = 74,794.77 - Step 5: Solve for x
x = 74,794.77/398.87 - Step 6: Final answer
x = 187.52
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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.