Finding the Fourth Proportional to 219.31, 328.86 and 128.03
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Solution
The fourth proportional to 219.31, 328.86 and 128.03 is: 191.99
Step by Step Solution
- Step 1: Write the proportion equation
219.31 : 328.86 = 128.03 : x - Step 2: Convert to fraction form
219.31/328.86 = 128.03/x - Step 3: Cross multiply
219.31x = 328.86 × 128.03 - Step 4: Simplify right side
219.31x = 42,103.95 - Step 5: Solve for x
x = 42,103.95/219.31 - Step 6: Final answer
x = 191.99
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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.