Finding the Fourth Proportional to 421.05, 631.77 and 177.63
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Solution
The fourth proportional to 421.05, 631.77 and 177.63 is: 266.53
Step by Step Solution
- Step 1: Write the proportion equation
421.05 : 631.77 = 177.63 : x - Step 2: Convert to fraction form
421.05/631.77 = 177.63/x - Step 3: Cross multiply
421.05x = 631.77 × 177.63 - Step 4: Simplify right side
421.05x = 112,221.31 - Step 5: Solve for x
x = 112,221.31/421.05 - Step 6: Final answer
x = 266.53
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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.