Finding the Fourth Proportional to 813.26, 1,219.12 and 319.99
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Solution
The fourth proportional to 813.26, 1,219.12 and 319.99 is: 479.68
Step by Step Solution
- Step 1: Write the proportion equation
813.26 : 1,219.12 = 319.99 : x - Step 2: Convert to fraction form
813.26/1,219.12 = 319.99/x - Step 3: Cross multiply
813.26x = 1,219.12 × 319.99 - Step 4: Simplify right side
813.26x = 390,106.21 - Step 5: Solve for x
x = 390,106.21/813.26 - Step 6: Final answer
x = 479.68
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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.