Finding the Fourth Proportional to 305.42, 421.53 and 207.11
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Solution
The fourth proportional to 305.42, 421.53 and 207.11 is: 285.85
Step by Step Solution
- Step 1: Write the proportion equation
305.42 : 421.53 = 207.11 : x - Step 2: Convert to fraction form
305.42/421.53 = 207.11/x - Step 3: Cross multiply
305.42x = 421.53 × 207.11 - Step 4: Simplify right side
305.42x = 87,303.08 - Step 5: Solve for x
x = 87,303.08/305.42 - Step 6: Final answer
x = 285.85
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.