Finding the Fourth Proportional to 398.40, 550.55 and 299.99
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Solution
The fourth proportional to 398.40, 550.55 and 299.99 is: 414.55
Step by Step Solution
- Step 1: Write the proportion equation
398.40 : 550.55 = 299.99 : x - Step 2: Convert to fraction form
398.40/550.55 = 299.99/x - Step 3: Cross multiply
398.40x = 550.55 × 299.99 - Step 4: Simplify right side
398.40x = 165,155.24 - Step 5: Solve for x
x = 165,155.24/398.40 - Step 6: Final answer
x = 414.55
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.