Finding the Fourth Proportional to 387.03, 534.09 and 239.75
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Solution
The fourth proportional to 387.03, 534.09 and 239.75 is: 330.85
Step by Step Solution
- Step 1: Write the proportion equation
387.03 : 534.09 = 239.75 : x - Step 2: Convert to fraction form
387.03/534.09 = 239.75/x - Step 3: Cross multiply
387.03x = 534.09 × 239.75 - Step 4: Simplify right side
387.03x = 128,048.08 - Step 5: Solve for x
x = 128,048.08/387.03 - Step 6: Final answer
x = 330.85
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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.