Finding the Fourth Proportional to 218.79, 328.86 and 207.99
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Solution
The fourth proportional to 218.79, 328.86 and 207.99 is: 312.63
Step by Step Solution
- Step 1: Write the proportion equation
218.79 : 328.86 = 207.99 : x - Step 2: Convert to fraction form
218.79/328.86 = 207.99/x - Step 3: Cross multiply
218.79x = 328.86 × 207.99 - Step 4: Simplify right side
218.79x = 68,399.59 - Step 5: Solve for x
x = 68,399.59/218.79 - Step 6: Final answer
x = 312.63
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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.