Finding the Fourth Proportional to 317.93, 476.99 and 257.58
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Solution
The fourth proportional to 317.93, 476.99 and 257.58 is: 386.45
Step by Step Solution
- Step 1: Write the proportion equation
317.93 : 476.99 = 257.58 : x - Step 2: Convert to fraction form
317.93/476.99 = 257.58/x - Step 3: Cross multiply
317.93x = 476.99 × 257.58 - Step 4: Simplify right side
317.93x = 122,862.76 - Step 5: Solve for x
x = 122,862.76/317.93 - Step 6: Final answer
x = 386.45
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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.