Finding the Fourth Proportional to 405.41, 558.09 and 306.99
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Solution
The fourth proportional to 405.41, 558.09 and 306.99 is: 422.61
Step by Step Solution
- Step 1: Write the proportion equation
405.41 : 558.09 = 306.99 : x - Step 2: Convert to fraction form
405.41/558.09 = 306.99/x - Step 3: Cross multiply
405.41x = 558.09 × 306.99 - Step 4: Simplify right side
405.41x = 171,328.05 - Step 5: Solve for x
x = 171,328.05/405.41 - Step 6: Final answer
x = 422.61
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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.