Finding the Fourth Proportional to 290.08, 399.99 and 207.15
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Solution
The fourth proportional to 290.08, 399.99 and 207.15 is: 285.64
Step by Step Solution
- Step 1: Write the proportion equation
290.08 : 399.99 = 207.15 : x - Step 2: Convert to fraction form
290.08/399.99 = 207.15/x - Step 3: Cross multiply
290.08x = 399.99 × 207.15 - Step 4: Simplify right side
290.08x = 82,856.93 - Step 5: Solve for x
x = 82,856.93/290.08 - Step 6: Final answer
x = 285.64
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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.