Finding the Fourth Proportional to 639.99, 959.95 and 177.80
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Solution
The fourth proportional to 639.99, 959.95 and 177.80 is: 266.68
Step by Step Solution
- Step 1: Write the proportion equation
639.99 : 959.95 = 177.80 : x - Step 2: Convert to fraction form
639.99/959.95 = 177.80/x - Step 3: Cross multiply
639.99x = 959.95 × 177.80 - Step 4: Simplify right side
639.99x = 170,674.53 - Step 5: Solve for x
x = 170,674.53/639.99 - Step 6: Final answer
x = 266.68
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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.