Finding the Fourth Proportional to 317.91, 438.99 and 307.59
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Solution
The fourth proportional to 317.91, 438.99 and 307.59 is: 424.74
Step by Step Solution
- Step 1: Write the proportion equation
317.91 : 438.99 = 307.59 : x - Step 2: Convert to fraction form
317.91/438.99 = 307.59/x - Step 3: Cross multiply
317.91x = 438.99 × 307.59 - Step 4: Simplify right side
317.91x = 135,028.93 - Step 5: Solve for x
x = 135,028.93/317.91 - Step 6: Final answer
x = 424.74
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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.