Finding the Fourth Proportional to 387.99, 581.99 and 279.86
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Solution
The fourth proportional to 387.99, 581.99 and 279.86 is: 419.78
Step by Step Solution
- Step 1: Write the proportion equation
387.99 : 581.99 = 279.86 : x - Step 2: Convert to fraction form
387.99/581.99 = 279.86/x - Step 3: Cross multiply
387.99x = 581.99 × 279.86 - Step 4: Simplify right side
387.99x = 162,871.41 - Step 5: Solve for x
x = 162,871.41/387.99 - Step 6: Final answer
x = 419.78
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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.