Finding the Fourth Proportional to 813.84, 1,220.36 and 265.68
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Solution
The fourth proportional to 813.84, 1,220.36 and 265.68 is: 398.39
Step by Step Solution
- Step 1: Write the proportion equation
813.84 : 1,220.36 = 265.68 : x - Step 2: Convert to fraction form
813.84/1,220.36 = 265.68/x - Step 3: Cross multiply
813.84x = 1,220.36 × 265.68 - Step 4: Simplify right side
813.84x = 324,225.24 - Step 5: Solve for x
x = 324,225.24/813.84 - Step 6: Final answer
x = 398.39
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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.