Finding the Fourth Proportional to 854.24, 1,279.74 and 420.08
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Solution
The fourth proportional to 854.24, 1,279.74 and 420.08 is: 629.32
Step by Step Solution
- Step 1: Write the proportion equation
854.24 : 1,279.74 = 420.08 : x - Step 2: Convert to fraction form
854.24/1,279.74 = 420.08/x - Step 3: Cross multiply
854.24x = 1,279.74 × 420.08 - Step 4: Simplify right side
854.24x = 537,593.18 - Step 5: Solve for x
x = 537,593.18/854.24 - Step 6: Final answer
x = 629.32
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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.