Finding the Fourth Proportional to 689.84, 1,034.52 and 305
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Solution
The fourth proportional to 689.84, 1,034.52 and 305 is: 457.39
Step by Step Solution
- Step 1: Write the proportion equation
689.84 : 1,034.52 = 305 : x - Step 2: Convert to fraction form
689.84/1,034.52 = 305/x - Step 3: Cross multiply
689.84x = 1,034.52 × 305 - Step 4: Simplify right side
689.84x = 315,528.60 - Step 5: Solve for x
x = 315,528.60/689.84 - Step 6: Final answer
x = 457.39
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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.