Finding the Fourth Proportional to 386.93, 533.74 and 313.12
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Solution
The fourth proportional to 386.93, 533.74 and 313.12 is: 431.92
Step by Step Solution
- Step 1: Write the proportion equation
386.93 : 533.74 = 313.12 : x - Step 2: Convert to fraction form
386.93/533.74 = 313.12/x - Step 3: Cross multiply
386.93x = 533.74 × 313.12 - Step 4: Simplify right side
386.93x = 167,122.14 - Step 5: Solve for x
x = 167,122.14/386.93 - Step 6: Final answer
x = 431.92
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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.