Finding the Fourth Proportional to 386.74, 579.84 and 313.84
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Solution
The fourth proportional to 386.74, 579.84 and 313.84 is: 470.54
Step by Step Solution
- Step 1: Write the proportion equation
386.74 : 579.84 = 313.84 : x - Step 2: Convert to fraction form
386.74/579.84 = 313.84/x - Step 3: Cross multiply
386.74x = 579.84 × 313.84 - Step 4: Simplify right side
386.74x = 181,976.99 - Step 5: Solve for x
x = 181,976.99/386.74 - Step 6: Final answer
x = 470.54
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.