Finding the Fourth Proportional to 421.24, 630.93 and 258.43
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Solution
The fourth proportional to 421.24, 630.93 and 258.43 is: 387.07
Step by Step Solution
- Step 1: Write the proportion equation
421.24 : 630.93 = 258.43 : x - Step 2: Convert to fraction form
421.24/630.93 = 258.43/x - Step 3: Cross multiply
421.24x = 630.93 × 258.43 - Step 4: Simplify right side
421.24x = 163,051.24 - Step 5: Solve for x
x = 163,051.24/421.24 - Step 6: Final answer
x = 387.07
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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.