Finding the Fourth Proportional to 386.99, 579.43 and 203.99
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Solution
The fourth proportional to 386.99, 579.43 and 203.99 is: 305.43
Step by Step Solution
- Step 1: Write the proportion equation
386.99 : 579.43 = 203.99 : x - Step 2: Convert to fraction form
386.99/579.43 = 203.99/x - Step 3: Cross multiply
386.99x = 579.43 × 203.99 - Step 4: Simplify right side
386.99x = 118,197.93 - Step 5: Solve for x
x = 118,197.93/386.99 - Step 6: Final answer
x = 305.43
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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.