Finding the Fourth Proportional to 387.99, 581.98 and 243.81
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Solution
The fourth proportional to 387.99, 581.98 and 243.81 is: 365.71
Step by Step Solution
- Step 1: Write the proportion equation
387.99 : 581.98 = 243.81 : x - Step 2: Convert to fraction form
387.99/581.98 = 243.81/x - Step 3: Cross multiply
387.99x = 581.98 × 243.81 - Step 4: Simplify right side
387.99x = 141,889.63 - Step 5: Solve for x
x = 141,889.63/387.99 - Step 6: Final answer
x = 365.71
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.