Finding the Fourth Proportional to 387.08, 534.19 and 239.80
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Solution
The fourth proportional to 387.08, 534.19 and 239.80 is: 330.94
Step by Step Solution
- Step 1: Write the proportion equation
387.08 : 534.19 = 239.80 : x - Step 2: Convert to fraction form
387.08/534.19 = 239.80/x - Step 3: Cross multiply
387.08x = 534.19 × 239.80 - Step 4: Simplify right side
387.08x = 128,098.76 - Step 5: Solve for x
x = 128,098.76/387.08 - Step 6: Final answer
x = 330.94
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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.