Finding the Fourth Proportional to 202.64, 279.68 and 128.99
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Solution
The fourth proportional to 202.64, 279.68 and 128.99 is: 178.03
Step by Step Solution
- Step 1: Write the proportion equation
202.64 : 279.68 = 128.99 : x - Step 2: Convert to fraction form
202.64/279.68 = 128.99/x - Step 3: Cross multiply
202.64x = 279.68 × 128.99 - Step 4: Simplify right side
202.64x = 36,075.28 - Step 5: Solve for x
x = 36,075.28/202.64 - Step 6: Final answer
x = 178.03
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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.