Finding the Fourth Proportional to 387.19, 534.34 and 229.79
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Solution
The fourth proportional to 387.19, 534.34 and 229.79 is: 317.11
Step by Step Solution
- Step 1: Write the proportion equation
387.19 : 534.34 = 229.79 : x - Step 2: Convert to fraction form
387.19/534.34 = 229.79/x - Step 3: Cross multiply
387.19x = 534.34 × 229.79 - Step 4: Simplify right side
387.19x = 122,782.74 - Step 5: Solve for x
x = 122,782.74/387.19 - Step 6: Final answer
x = 317.11
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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.