Finding the Fourth Proportional to 202.08, 278.88 and 136.74
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Solution
The fourth proportional to 202.08, 278.88 and 136.74 is: 188.71
Step by Step Solution
- Step 1: Write the proportion equation
202.08 : 278.88 = 136.74 : x - Step 2: Convert to fraction form
202.08/278.88 = 136.74/x - Step 3: Cross multiply
202.08x = 278.88 × 136.74 - Step 4: Simplify right side
202.08x = 38,134.05 - Step 5: Solve for x
x = 38,134.05/202.08 - Step 6: Final answer
x = 188.71
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.