Finding the Fourth Proportional to 919.04, 1,378.72 and 406.08
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Solution
The fourth proportional to 919.04, 1,378.72 and 406.08 is: 609.19
Step by Step Solution
- Step 1: Write the proportion equation
919.04 : 1,378.72 = 406.08 : x - Step 2: Convert to fraction form
919.04/1,378.72 = 406.08/x - Step 3: Cross multiply
919.04x = 1,378.72 × 406.08 - Step 4: Simplify right side
919.04x = 559,870.62 - Step 5: Solve for x
x = 559,870.62/919.04 - Step 6: Final answer
x = 609.19
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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.