Finding the Fourth Proportional to 257.91, 386.99 and 120.93
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Solution
The fourth proportional to 257.91, 386.99 and 120.93 is: 181.45
Step by Step Solution
- Step 1: Write the proportion equation
257.91 : 386.99 = 120.93 : x - Step 2: Convert to fraction form
257.91/386.99 = 120.93/x - Step 3: Cross multiply
257.91x = 386.99 × 120.93 - Step 4: Simplify right side
257.91x = 46,798.70 - Step 5: Solve for x
x = 46,798.70/257.91 - Step 6: Final answer
x = 181.45
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.