Finding the Fourth Proportional to 387.06, 534.14 and 239.70
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Solution
The fourth proportional to 387.06, 534.14 and 239.70 is: 330.78
Step by Step Solution
- Step 1: Write the proportion equation
387.06 : 534.14 = 239.70 : x - Step 2: Convert to fraction form
387.06/534.14 = 239.70/x - Step 3: Cross multiply
387.06x = 534.14 × 239.70 - Step 4: Simplify right side
387.06x = 128,033.36 - Step 5: Solve for x
x = 128,033.36/387.06 - Step 6: Final answer
x = 330.78
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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.