Finding the Fourth Proportional to 305.24, 420.94 and 207.10
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Solution
The fourth proportional to 305.24, 420.94 and 207.10 is: 285.60
Step by Step Solution
- Step 1: Write the proportion equation
305.24 : 420.94 = 207.10 : x - Step 2: Convert to fraction form
305.24/420.94 = 207.10/x - Step 3: Cross multiply
305.24x = 420.94 × 207.10 - Step 4: Simplify right side
305.24x = 87,176.67 - Step 5: Solve for x
x = 87,176.67/305.24 - Step 6: Final answer
x = 285.60
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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.