Finding the Fourth Proportional to 393.76, 542.91 and 283.18
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Solution
The fourth proportional to 393.76, 542.91 and 283.18 is: 390.44
Step by Step Solution
- Step 1: Write the proportion equation
393.76 : 542.91 = 283.18 : x - Step 2: Convert to fraction form
393.76/542.91 = 283.18/x - Step 3: Cross multiply
393.76x = 542.91 × 283.18 - Step 4: Simplify right side
393.76x = 153,741.25 - Step 5: Solve for x
x = 153,741.25/393.76 - Step 6: Final answer
x = 390.44
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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.