Finding the Fourth Proportional to 714.70, 986.70 and 478.99
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Solution
The fourth proportional to 714.70, 986.70 and 478.99 is: 661.28
Step by Step Solution
- Step 1: Write the proportion equation
714.70 : 986.70 = 478.99 : x - Step 2: Convert to fraction form
714.70/986.70 = 478.99/x - Step 3: Cross multiply
714.70x = 986.70 × 478.99 - Step 4: Simplify right side
714.70x = 472,619.43 - Step 5: Solve for x
x = 472,619.43/714.70 - Step 6: Final answer
x = 661.28
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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.