Finding the Fourth Proportional to 421.24, 631.45 and 204.70
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Solution
The fourth proportional to 421.24, 631.45 and 204.70 is: 306.84
Step by Step Solution
- Step 1: Write the proportion equation
421.24 : 631.45 = 204.70 : x - Step 2: Convert to fraction form
421.24/631.45 = 204.70/x - Step 3: Cross multiply
421.24x = 631.45 × 204.70 - Step 4: Simplify right side
421.24x = 129,253.63 - Step 5: Solve for x
x = 129,253.63/421.24 - Step 6: Final answer
x = 306.84
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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.