Finding the Fourth Proportional to 309.97, 427.76 and 178.99
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Solution
The fourth proportional to 309.97, 427.76 and 178.99 is: 247.01
Step by Step Solution
- Step 1: Write the proportion equation
309.97 : 427.76 = 178.99 : x - Step 2: Convert to fraction form
309.97/427.76 = 178.99/x - Step 3: Cross multiply
309.97x = 427.76 × 178.99 - Step 4: Simplify right side
309.97x = 76,564.76 - Step 5: Solve for x
x = 76,564.76/309.97 - Step 6: Final answer
x = 247.01
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.