Finding the Fourth Proportional to 431.10, 646.21 and 170.99
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Solution
The fourth proportional to 431.10, 646.21 and 170.99 is: 256.31
Step by Step Solution
- Step 1: Write the proportion equation
431.10 : 646.21 = 170.99 : x - Step 2: Convert to fraction form
431.10/646.21 = 170.99/x - Step 3: Cross multiply
431.10x = 646.21 × 170.99 - Step 4: Simplify right side
431.10x = 110,494.59 - Step 5: Solve for x
x = 110,494.59/431.10 - Step 6: Final answer
x = 256.31
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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.