Finding the Fourth Proportional to 919.45, 1,378.97 and 302.99
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Solution
The fourth proportional to 919.45, 1,378.97 and 302.99 is: 454.42
Step by Step Solution
- Step 1: Write the proportion equation
919.45 : 1,378.97 = 302.99 : x - Step 2: Convert to fraction form
919.45/1,378.97 = 302.99/x - Step 3: Cross multiply
919.45x = 1,378.97 × 302.99 - Step 4: Simplify right side
919.45x = 417,816.31 - Step 5: Solve for x
x = 417,816.31/919.45 - Step 6: Final answer
x = 454.42
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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.