Finding the Fourth Proportional to 283.08, 390.49 and 189.70
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Solution
The fourth proportional to 283.08, 390.49 and 189.70 is: 261.68
Step by Step Solution
- Step 1: Write the proportion equation
283.08 : 390.49 = 189.70 : x - Step 2: Convert to fraction form
283.08/390.49 = 189.70/x - Step 3: Cross multiply
283.08x = 390.49 × 189.70 - Step 4: Simplify right side
283.08x = 74,075.95 - Step 5: Solve for x
x = 74,075.95/283.08 - Step 6: Final answer
x = 261.68
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.