Finding the Fourth Proportional to 420.78, 630.97 and 177.26
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Solution
The fourth proportional to 420.78, 630.97 and 177.26 is: 265.81
Step by Step Solution
- Step 1: Write the proportion equation
420.78 : 630.97 = 177.26 : x - Step 2: Convert to fraction form
420.78/630.97 = 177.26/x - Step 3: Cross multiply
420.78x = 630.97 × 177.26 - Step 4: Simplify right side
420.78x = 111,845.74 - Step 5: Solve for x
x = 111,845.74/420.78 - Step 6: Final answer
x = 265.81
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.