Finding the Fourth Proportional to 431.18, 646.75 and 122.99
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Solution
The fourth proportional to 431.18, 646.75 and 122.99 is: 184.48
Step by Step Solution
- Step 1: Write the proportion equation
431.18 : 646.75 = 122.99 : x - Step 2: Convert to fraction form
431.18/646.75 = 122.99/x - Step 3: Cross multiply
431.18x = 646.75 × 122.99 - Step 4: Simplify right side
431.18x = 79,543.78 - Step 5: Solve for x
x = 79,543.78/431.18 - Step 6: Final answer
x = 184.48
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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.